Multiphysics Coupling: Thermal Connection in COMSOL Tutorial
Learn how to establish temperature continuity between volume and shell domains using the Thermal Connection, Layered Shell, Surfaces multiphysics coupling in a COMSOL tutorial. Explore configurations, model definitions, and results comparing heat transfer in solids and shells interfaces, ensuring accurate temperature distributions.
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Presentation Transcript
Background Volumes can become a source of a large amount of degrees of freedom in a model, inducing a large computational cost. Certain parts of models can be simplified to shells to reduce this cost, but others may need to remain volumes. In such cases, the multiphysics coupling node Thermal Connection, Layered Shell, Surfaces establishes the continuity of the temperatures between the volume domains and shell domains through facing boundary. This tutorial model shows how to setup the coupling node, and test the results of a configuration combining Heat Transfer in Solids and Heat Transfer in Shells interfaces versus this same configuration with only a Heat Transfer in Solids interface.
Shell Model Definition In the both configurations, the main bodies are made of copper, the layered domains are made of an aluminum layer and a silica glass layer. Silica glass layer Copper bodies In the reference configuration, both domains are in contact and modeled as volumes. Aluminum layer In the shell configuration, the layered domains is modeled as a shell and is not in contact with the main body, it is facing its top boundary. Model geometry
Model Definition In the both configurations, fixed varying temperatures are applied on bottom boundaries. In the reference configuration, temperature continuity between the body and the layered domain is naturally ensured by the contact of the solids. Fixed temperature In the shell configuration, the temperature continuity is ensured by the coupling node even though they are not geometrically in contact. Fixed temperature Model boundary conditions
Results Temperature varies continuously between the body and the layered domain. The shell configuration reproduces the behavior of the reference configuration. Temperature distribution
Results The figure shows the temperatures through the thickness in the layered domains. The shell approach matches with the reference computation thanks to the Thermal Connection, Layered Shell, Surfaces multiphysics coupling. This multiphysics coupling ensures temperature continuity even though the volume and shell domains are not geometrically in contact. Temperature comparison in the layered domains
