10-5 K-1 and 1070 K, \mathbf{E}_\mathrm{th} is around 0.9%. thermal_connection_facing_boundary Posted Oct 22, 2017, 3:31 p.m. GMT+2 https://www. This multiphysics coupling greatly simplifies the use of combined domain and shell interfaces in models. thermal_connection_shared_boundaries COMSOLMultiphysics 6.1 brings several new tutorial models to the Heat Transfer Module. A parasol provides shade for one of the coolers, and the temperature of the beverage cans is computed over time. Thermal expansion is a functionality found in the optional MEMS Module and Structural Mechanics Module (It is not part of the structural mechanics capabilities of the core package), so you will need to make sure your license includes one of those two. Download from the Application Gallery, Application Library Title: Orbit and incident irradiation of a 1U CubeSat at 400 km altitude, with an inclination of 50 and the longitude of the ascending node at 0. Download from the Application Gallery, Application Library Title: spacecraft_thermal_analysis In order to maximize heat transfer, the heat exchanger is made of a porous aluminum matrix in which the hot oil flows. The total irradiation and the radiative loads from all environmental sources are computed. Model geometry with arrows representing the emitted radiation direction. plate_fin_heat_exchanger The condition can be set on a boundary shared by the two interfaces or on two boundaries facing each other. This model shows solar heat flux at the beach, where two styrofoam coolers contain beverage cans. Can anybody tell me how to solve and couple thermoelastic equation with this heat transfer in solid module. You can use these examples as a starting point for your own simulation work by downloading the tutorial model or demo app file and its accompanying instructions. When temperatures remain near the reference state and without too rapid stress variations, these coupling effects are negligible. This 18-minute archived webinar includes a quick introduction to the COMSOL Multiphysics modeling workflow for heat transfer analysis. Oil flow and fins temperature in a plate-fin heat exchanger. Initial ConditionsGeneral Heat Transfer 1. View these updates in the new Topology Verification for Surface-to-Surface Radiation model and these existing models: The ray shooting method has been improved so that small surfaces are detected even when a coarse resolution is used for the view factor evaluation. Consequently, small variations of temperature should occur. You can view this feature in the following new models: The new Thermal Connection multiphysics couplings are designed to define a continuity condition between two temperature fields, computed by a domain heat transfer interface and a Heat Transfer in Shells interface, respectively. This option makes it possible to use accurate phase change descriptions from measured or material databases. The spacecraft surface color represents the magnitude of the incident solar irradiation. The meteorological data from the ASHRAE 2021 handbook has been integrated into COMSOLMultiphysics and contains ambient data from more than 8500 weather stations around the world. My personal favorites are this video: Temperature distribution in a satellite circuit board with electrical components. Posted Nov 3, 2022, 10:57 a.m. EDT Heat Transfer, Physics Interfaces 0 Replies. The bottom structure is computed in a classical geometry made of different domains. Furthermore, during the view factor evaluation, an optional verification is available to detect inconsistent topology. Note that while COMSOL employees may participate in the discussion forum, COMSOL software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team. Your internet explorer is in compatibility mode and may not be displaying the website correctly. The following models showcase these new improvements: In the Surface-to-Surface Radiation interface, it is now possible to add a Fluence Rate Calculation node in order to select the domains where the fluence rate has to be computed. During the model setup, the emitted radiation direction is now represented in the Graphics window with a symbol for the Opacity controlled option and gray surface models. There are two options available: Standard, which is suitable for most configurations, and High viscous dissipation at wall, which accounts for viscous dissipation in the boundary layer. 3. Fluence rate in an ultraviolet reactor filled with quasitransparent water. I am drying a food material and I want to upload and analyse/ use " temperature v/s time" date of the plot in comsol. Download from the Application Gallery My references give k=(1/J) F k_0 F^T which is not the same even for isotropic k_0. The direct solar, albedo, and Earth IR thermal loads are precomputed in an. topology_verification_nonradiating Combined with the resolution adaptation, this improves the view factor accuracy with an optimal number of rays. Thermal expansion is a functionality found in the optional MEMS Module and Structural Mechanics Module (It is not part of the structural mechanics capabilities of the core package), so you will need to make sure your license includes one of those two. Fluence rate in an ultraviolet reactor filled with quasitransparent water. Your internet explorer is in compatibility mode and may not be displaying the website correctly. be selected. Chapter Selection Fluence rate in an ultraviolet reactor filled with quasitransparent water. A satellite in orbit experiences solar, albedo, and planetary infrared (IR) loads, where albedo and planetary IR can vary with latitude and also with longitude. The new Zero Pressure Gradient 2D Flat Plate model highlights this new feature. This multiphysics coupling greatly simplifies the use of combined domain and shell interfaces in models. You are completely right and the formulas have been fixed in this blog post. The new Orbital Thermal Loads interface provides ready-made features for modeling radiative loads on a spacecraft, in particular radiation from the Sun and Earth for satellites orbiting around Earth. Hello friends I am an IITian. Warning Your internet explorer is in compatibility mode and may not be displaying the website correctly. Maximum temperatures on the hottest days of the year (blue, 2013; green, 2021) at a weather station in Glasgow, UK, show that measured temperature increased after 2013. The plot shows the behavior of a turbulence model and wall functions in the boundary layer of a turbulent flow. Read more about the Heat Transfer Module updates below. Application Mode Selection In the Multiphysics menu switch to Solid, Stress-Strain application mode by selecting it. The meteorological data from the ASHRAE 2021 handbook has been integrated into COMSOLMultiphysics and contains ambient data from more than 8500 weather stations around the world. As shown in the previous two examples, COMSOL Multiphysics provides appropriate functionalities to conveniently account for them. You can fix this by pressing 'F12' on your keyboard, Selecting 'Document Mode' and choosing 'standards' (or the latest version View this update in the new Phase Change in a Semi-Infinite Soil Column - Lunardini Solution model and the following existing models: To simplify model definitions, the Moisture Flow multiphysics coupling has been updated so that the evaporation rate variable computed by the Moisture Transport interface is accounted for in the mass balance computed by the Brinkman Equations interface. spacecraft_thermal_analysis You will also find tutorials including step by step instructions in the software itself under File > Application Libraries, and on the website in the Application Gallery here: https://www.comsol.com/models?q=thermal%20expansion. This consent may be withdrawn. The reactor contains an annular fluid region surrounding a cylindrical lamp. Send Private Message Flag post as spam. In addition, the Open Boundary and Inflow boundary conditions can now be applied to exterior boundaries adjacent to domains where the Hygroscopic Porous Medium is active. orbit_calculation Starting from an isothermal profile of 20C everywhere, the small temperature variations lead to a negligible thermal strain tensor. Download from the Application Gallery A satellite in orbit experiences solar, albedo, and planetary infrared (IR) loads, where albedo and planetary IR can vary with latitude and also with longitude. Heat Transfer Module Updates. Volume-related quantities in both frames have different values and need a conversion from each other, in particular for specific energies and density. The top structure is computed as a combination of domains and shells that are connected using the. Automatic detection of suspicious radiation-direction definition in the user interface. Learn more about the specialized features for heat transfer analysis available in the Heat Transfer Module here. Along with the possibility of adding user-defined meteorological data, ambient variables can be computed from monthly and hourly averaged measurements from values in handbooks provided by the American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE). Temperature field and deformation of the stator blade, exaggerated plot with a scale factor of 3 for more visibility. Download from the Application Gallery, Application Library Title: To check, in the software, go to File > License and Used Products. The black color of the orbit track indicates the eclipse. We discuss methods that involve simple approximations, high-fidelity nonisothermal flow coupling, modeling heat transfer at fluid-solid interfaces, boundary approximations using heat transfer coefficients, techniques to fully resolve the flow and temperature fields, and more. The new Orbital Thermal Loads interface provides ready-made features for modeling radiative loads on a spacecraft, in particular radiation from the Sun and Earth for satellites orbiting around Earth. The main contribution to thermal effects is now the thermoelastic heat source due to rapid stress variations. https://www.comsol.com/video/how-set-up-run-simulation-comsol-multiphysics thermal_connection_facing_boundary Then, we add the two multiphysics features below to couple the Heat Transfer in Solids and Solid Mechanics interfaces: The study can also be extended to 30 milliseconds to observe more load periods. If you do have either of those products, you will find quite a few tutorials and videos to guide you. Topology Verification for Surface-to-Surface Radiation, parallel_plates_diffuse_specular_ray_shooting, petzval_lens_stop_analysis_with_surface_-_to_-_surface_radiation, Annular Ultraviolet Reactor, Transparent Water, Phase Change in a Semi-Infinite Soil Column - Lunardini Solution, continuous_casting_apparent_heat_capacity. Heat Transfer & Phase Change, Studies & Solvers, Structural Mechanics Best, For users of the Heat Transfer Module, COMSOL Multiphysics version 5.3a brings a new Inflow boundary condition that can account for upstream temperature and pressure, a complete multiphysics coupling for modeling moisture transport in air, as well as a new interface for modeling radiative beams in absorbing media. You can view this feature in the following new models: The new Thermal Connection multiphysics couplings are designed to define a continuity condition between two temperature fields, computed by a domain heat transfer interface and a Heat Transfer in Shells interface, respectively. View these updates in the new Topology Verification for Surface-to-Surface Radiation model and these existing models: The ray shooting method has been improved so that small surfaces are detected even when a coarse resolution is used for the view factor evaluation. Application Library Title: By providing your email address, you consent to receive emails from COMSOL AB and its affiliates about the COMSOL Blog, and agree that COMSOL may process your information according to its Privacy Policy. Version 5.2 (Earth image credit: Visible Earth and NASA), Temperature field in a circuit board (domains) and in a disk-stack heat sink (shell) with a continuity condition set by the. Download from the Application Gallery. This option makes it possible to use accurate phase change descriptions from measured or material databases. Heat Transfer Module Updates. Heat is conducted through aluminum fins in contact with the porous matrix. Spacecraft orbit and incident irradiation. plate_fin_heat_exchanger More related official tutorial videos of COMSOL:1. https://www.comsol.com/video/introduction-to-modeling-heat-transfer-in-comsol-multiphysics2. listed if standards is not an option). "Please visit my website for doubt clarifications and project simulations" -. These tools greatly reduce the risk of erroneous definition of models, especially for large and complex geometrical configurations. (x, y) = (1.54~\textrm{cm}, 0.82~\textrm{cm}), \mathbf{F} = {\partial \mathbf{x}} / {\partial \mathbf{X}}, \mathbf{k} = J^{-1} \mathbf{F} \mathbf{k}_0 \mathbf{F}^T, W_{\sigma, 0} = \boldsymbol{\alpha} T : \frac{\mathrm{d} \mathbf{S}}{\mathrm{d} t}, T {\mathrm{d} \mathbf{S}} / {\mathrm{d} t}, conjugate heat transfer involving immobile solids, model thermal stress in a turbine stator blade, Thermal Stress Analysis of a Turbine Stator Blade, Simulating Thermal Stress in a Turbine Stator Blade, Multiscale Modeling in High-Frequency Electromagnetics, The influence of strain and stress on thermal quantities and boundary heat fluxes in the material or spatial frames, The temperature dependence of the elasticity matrix, The temperature dependence of the elastic strain tensor via the thermal strain tensor, This couples the temperature variable computed by the, The material frame where the equation of motion is formulated. To check, in the software, go to File > License and Used Products. The top structure is computed as a combination of domains and shells that are connected using the. Starting from an isothermal profile of 20C everywhere, the small temperature variations lead to a negligible thermal strain tensor. In this, I am explaining the simulation of heat transfer in solids through COMSOL Multiphysics software.\"Please visit my website for doubt clarifications and project simulations\" - https://chetan47.wixsite.com/cv47Please do LIke and Share this video.Please subscribe to my channel so that I will get motivated for making more videos.#heat transfer#Comsol#conduction heat transfer#COMSOL Multiphysics #heat transfer simulation simulation#CV47#mechanical engineering#GATEfollow me on Instagram- cv47_multiphysics The total irradiation and flux on the satellite are evaluated over several orbits. The warning symbols indicate the boundaries where inconsistent radiation settings have been identified. To check, in the software, go to File > License and Used Products. c , , Topology Verification for Surface-to-Surface Radiation, parallel_plates_diffuse_specular_ray_shooting, petzval_lens_stop_analysis_with_surface_-_to_-_surface_radiation, Annular Ultraviolet Reactor, Transparent Water, Phase Change in a Semi-Infinite Soil Column - Lunardini Solution, continuous_casting_apparent_heat_capacity. In this, I am explaining the simulation of heat transfer in solids through COMSOL Multiphysics software. The warning symbols indicate the boundaries where inconsistent radiation settings have been identified. For users of the Heat Transfer Module, COMSOL Multiphysics version 5.3 includes new functionality to model heat and moisture transport in air, a new solver for modeling heat transfer in the frequency domain, and heat sink geometry parts to more easily create certain geometries. This is needed for accurate results in the case of fast internal flow, especially for narrow paths or if the fluid is very viscous. You can use this feature to include the spacecraft radiative properties, orbit and orientation, orbital maneuvers, and planet properties. Download from the Application Gallery. COMSOLMultiphysics 6.1 brings several new tutorial models to the Heat Transfer Module. 2. 1 Reply, Please login with a confirmed email address before reporting spam. A warning symbol is displayed in the case of unexpected configuration. Download from the Application Gallery, Application Library Title: annular_ultraviolet_reactor_optically_transparent_water Combined with the resolution adaptation, this improves the view factor accuracy with an optimal number of rays. Spacecraft orbit and incident irradiation. These tools greatly reduce the risk of erroneous definition of models, especially for large and complex geometrical configurations. View this feature in the existing Disk-Stack Heat Sink model and the following new tutorial models: There are new tools available to assist with defining surface-to-surface radiation models. Model geometry with arrows representing the emitted radiation direction. orbit_calculation In addition, for all view factor computation methods, expressions used to define variables and equations are now preprocessed so that their readability is facilitated and their evaluation is much faster during the assembly step. With COMSOL Multiphysics, you will be able to account for coupled or multiphysics phenomena. Comparison of the temperature field in two similar structures. Temperature profile (surface plot) induced by viscous dissipation close to the wall and velocity direction (arrows). https://www.comsol.com/video/how-set-up-run-simulation-comsol-multiphysics Temperature profile in an initially frozen domain heated over time. https://cdn.comsol.com/documentation/5.3.0.316/IntroductionToCOMSOLMultiphysics.pdf The connector can be used for shells that are in contact through an edge, a boundary shared with the domain interface, or a boundary that is facing another boundary from the domain interface. how can i upload as well as . Download from the Application Gallery, Application Library Titles: annular_ultraviolet_reactor_optically_transparent_water The temperature profile (surface plot) and velocity direction (arrows) of the Zero Pressure Gradient 2D Flat Plate model. Furthermore, during the view factor evaluation, an optional verification is available to detect inconsistent topology. Heat is conducted through aluminum fins in contact with the porous matrix. Download from the Application Gallery, Application Library Title: This couples the temperature variable computed by the Heat Transfer in Solids interface with the Solids Mechanics interface The study can also be extended to 30 milliseconds to observe more load periods. Otherwise, they shall be added to the formulation on the model. You can fix this by pressing 'F12' on your keyboard, Selecting 'Document Mode' and choosing 'standards' (or the latest version Boundary ConditionsSolid, Stress-Strain 1. The physics interface also computes and generates results that show direct solar radiation, albedo, and planet infrared flux as well as the radiative heat transfer between the different spacecraft parts. You can view this new feature in the following existing models: In the Nonisothermal Flow coupling under its Heat Transfer Turbulence settings, a new Thermal wall function setting is available for Reynolds-averaged NavierStokes (RANS) turbulence models. The black color of the orbit track indicates the eclipse. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators . zero_pressure_gradient_2d_flat_plate Download from the Application Gallery, Application Library Title: In postprocessing, the actual volume expansion is found to be 2.76%. In this I have to solve heat diffusion equation alongwith time dependent thermoelastic equation. Along with the possibility of adding user-defined meteorological data, ambient variables can be computed from monthly and hourly averaged measurements from values in handbooks provided by the American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE). Is there a simple way to convert the deformed solid material frame to heat transfer spatial frame? In order to maximize heat transfer, the heat exchanger is made of a porous aluminum matrix in which the hot oil flows. Oil flow and fins temperature in a plate-fin heat exchanger. Temperature distribution in a satellite circuit board with electrical components. Maximum temperatures on the hottest days of the year (blue, 2013; green, 2021) at a weather station in Glasgow, UK, show that measured temperature increased after 2013. The track color indicates whether the satellite is in eclipse or not. Heat dissipation from a thin which is attache. For users of the Heat Transfer Module, COMSOLMultiphysics version 6.1 introduces new modeling tools for spacecraft thermal analyses, a multiphysics coupling for defining a continuity condition between shared or facing surfaces, and new tools for defining surface-to-surface radiation models. You can view this new feature in the Annular Ultraviolet Reactor, Transparent Water model. If you do have either of those products, you will find quite a few tutorials and videos to guide you. Download from the Application Gallery, Application Library Title: This is useful when you want to, for example, check the UV exposure in a water purification reactor. Download from the Application Gallery How can I manipulate these conversion matrices in COMSOL? The following models showcase these new improvements: In the Surface-to-Surface Radiation interface, it is now possible to add a Fluence Rate Calculation node in order to select the domains where the fluence rate has to be computed. Your internet explorer is in compatibility mode and may not be displaying the website correctly. For users of the Heat Transfer Module, COMSOL Multiphysics version 6.1 introduces new modeling tools for spacecraft thermal analyses, a multiphysics coupling for defining a continuity condition between shared or facing surfaces, and new tools for defining surface-to-surface radiation models. In this model, the arms of the brackets move according to rapid time-dependent loads. You will also find tutorials including step by step instructions in the software itself under File > Application Libraries, and on the website in the Application Gallery here: https://www.comsol.com/models?q=thermal%20expansion Discussion Closed This discussion was created more than 6 months ago and has been closed. The green curve indicates the limit of the boundary layer (99%. Ambient properties, such as temperature, humidity, precipitation, and solar radiation, can be defined from an Ambient Properties node under Definitions > Shared Properties. Developing a Silicon MEMS Chip for On-Demand DNA Synthesis, Analyzing LED Bulb Designs with Heat Transfer Simulation, Heat Transfer in Biological Tissue with Thermal Damage Analysis, This blog defines the thermal conductivity in the deformed region as k=(1/J)F^T k_0 F Click OK. The bottom structure is computed in a classical geometry made of different domains. Download from the Application Gallery, Application Library Title: COMSOL Multiphysics is a general-purpose software platform, based on advanced numerical methods, for modeling and simulating physics-based problems. This is useful when you want to, for example, check the UV exposure in a water purification reactor. You can view this new feature in the following existing models: In the Nonisothermal Flow coupling under its Heat Transfer Turbulence settings, a new Thermal wall function setting is available for Reynolds-averaged NavierStokes (RANS) turbulence models. Fluence rate in an ultraviolet reactor filled with quasitransparent water. In addition, the Open Boundary and Inflow boundary conditions can now be applied to exterior boundaries adjacent to domains where the Hygroscopic Porous Medium is active. The track color indicates whether the satellite is in eclipse or not. View this feature in the existing Disk-Stack Heat Sink model and the following new tutorial models: There are new tools available to assist with defining surface-to-surface radiation models. The direct solar, albedo, and Earth IR thermal loads are precomputed in an. Starting from an isothermal profile of 20C everywhere, the small temperature variations lead to a negligible thermal strain tensor. The spacecraft surface color represents the magnitude of the incident solar irradiation. The volume expansion, due to thermal effects, for large deformations is \Delta V/V_0 = J_\mathrm{th}-1 (where J_\mathrm{th} was introduced in Equation (8)). (Earth image credit: Visible Earth and NASA), Temperature field in a circuit board (domains) and in a disk-stack heat sink (shell) with a continuity condition set by the. Temperature profile of the bracket over time, exaggerated plot with a scale factor of 10 for more visibility. To check, in the software, go to File > License and Used Products. and the busbar tutorial in the Introduction to COMSOL Multiphysics manual: Transport of diluted species with heat and mass transfer in solids. Orbit and incident irradiation of a 1U CubeSat at 400 km altitude, with an inclination of 50 and the longitude of the ascending node at 0. Your internet explorer is in compatibility mode and may not be displaying the website correctly. Temperature profile in an initially frozen domain heated over time. . I am trying to simulate radiation pressure and electrostriction force effects on the surface displacements on solid surface. You can fix this by pressing 'F12' on your keyboard, Selecting 'Document Mode' and choosing 'standards' (or the latest version This can be found . In the Phase Change Material feature, a User-defined phase transition function is available that enables more accurate description of material properties. The green curve indicates the limit of the boundary layer (99%. thermal_connection_shared_boundaries Check if the default value in the edit field for T (t0) is 273.15. Temperature profile (surface plot) induced by viscous dissipation close to the wall and velocity direction (arrows). Click the triangle to the left of . Click the Init tab. Download from the Application Gallery, Application Library Title: Thermal expansion is a functionality found in the optional MEMS Module and Structural Mechanics Module (It is not part of the structural mechanics capabilities of the core package), so you will need to make sure your license includes one of those two. Learn about these heat transfer features and . Mahima Bora. When combining this interface with a heat transfer interface, you can account for heat conduction in the solid parts of a spacecraft. Differences of about 0.8 K can be observed between the extreme temperatures in the bracket. Download from the Application Gallery, Application Library Title: orbit_thermal_ loads The two governing equations each contain coupling terms that makes the solid motion dependent on the temperature and the heat transfer dependent on the solid deformation. To delve deeper into this topic, you can download the files related to the models mentioned here and read a couple of related blog posts via the links in the section below. There are two options available: Standard, which is suitable for most configurations, and High viscous dissipation at wall, which accounts for viscous dissipation in the boundary layer. \rho_0 \frac{\mathrm{d}^2 \mathbf{u}}{\mathrm{d}t^2} = \nabla \cdot (\mathrm{\mathbf{FS}}) + \mathbf{f}_\mathrm{vol}, \mathbf{S} = \mathbf{C}:\mathbf{E}_\mathrm{el}, \mathbf{E}_\mathrm{el} = \mathbf{E}_\mathrm{tot}-\mathbf{E}_\mathrm{th}, \mathbf{E}_\mathrm{tot} = \frac{1}{2}(\mathbf{F}\mathbf{F}^\mathrm{T}-\mathbf{I}), \mathbf{E}_\mathrm{th} = \boldsymbol{\alpha} (T-T_\mathrm{ref}), \mathbf{E}_\mathrm{el} = \frac{1}{2}(\mathbf{F}_\mathrm{el}\mathbf{F}_\mathrm{el}^\mathrm{T}-\mathbf{I}), \mathbf{F}_\mathrm{el} = J_\mathrm{th}^{-1/3} \mathbf{F}, J_\mathrm{th} = \left( 1 + \alpha (T-T_\mathrm{ref}) \right)^3, \rho C_p \left( \frac{\partial T}{\partial t} + \mathbf{u} \cdot \nabla T \right) = \nabla \cdot (k \nabla T) + W_\sigma + Q, W_\sigma = \mathrm{det}(\mathbf{F})^{-1} T \frac{\partial \mathbf{E}_\mathrm{tot}}{\partial T} : \frac{\mathrm{d}\mathbf{S}}{\mathrm{d}t}, W_\sigma = \mathrm{det}(\mathbf{F})^{-1} \boldsymbol{\alpha} T : \frac{\mathrm{d}\mathbf{S}}{\mathrm{d}t}. Heat Transfer & Phase Change, Studies & Solvers, Structural Mechanics, Modeling Laser-Material Interactions in COMSOL Multiphysics, Enclosed Geometry Heat Transfer in Solids, Guidelines for Equation-Based Modeling in Axisymmetric Components. Download from the Application Gallery, Application Library Title: You can fix this by pressing 'F12' on your keyboard, Selecting 'Document Mode' and choosing 'standards' (or the latest version under the Heat Transfer module. listed if standards is not an option). Learn more. Thank you very much for your comment! You can view this new feature in the Annular Ultraviolet Reactor, Transparent Water model. The total irradiation and the radiative loads from all environmental sources are computed. Comparison of the temperature field in two similar structures. orbit_thermal_ loads The condition can be set on a boundary shared by the two interfaces or on two boundaries facing each other. case heat transfer in solids will . I am using comsol 5.3a version During the model setup, the emitted radiation direction is now represented in the Graphics window with a symbol for the Opacity controlled option and gray surface models. Hello Monika, thermal_connection_edges in Solids, left click this so that it is highlighted then click the blue, right pointing Read more about the Heat Transfer Module updates below. Editors note: This blog post was updated on 7/23/2015 to be consistent with version 5.1 of COMSOL Multiphysics. The color on the Earth surface represents the albedo magnitude. The heating and cooling process is, as expected, located at corners where the stress is more important and its variations stronger. The existing model neglects these thermal effects, so we need to add a new Heat Transfer in Solids interface.
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comsol heat transfer in solids tutorial