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Multiphysics Modeling Using COMSOL®4 by Roger Pryor

By Roger Pryor

COMSOL Multiphysics® software program is the most well-liked modeling instrument for engineers and scientists. With the hot unlock of v.4.0, it permits the consumer to create simulated environments for automated modeling of actual platforms and units. Designed to be used by way of the pro engineer or in a senior point path, Multiphysics Modeling utilizing COMSOL v.4 explores quite a lot of versions in coordinate platforms from 1D to 3D and introduces the readers to the numerical research thoughts hired within the COMSOL Multiphysics® software program. It specializes in versions from the electromagnetic, digital, optical, thermal physics, and biomedical components as examples for later purposes utilized in the advance of units and structures. The textual content comprises executable code for every version and comparable animations at the accompanying DVD.

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33. 33 shows the Settings for the Heat Transfer in Solids window. The modeler can now verify that the selected material has been assigned to Domain 1 and that the material’s properties are available for use in the equations to calculate the model solution. If the modeler were now to Click on Thermal Insulation 1, he would find that both end points (1, 2) are insulated. 15) and the Radiative Intensities are set to 0. Those values are the result of the implicit assumptions remarked on earlier. At this point, the modeler needs to set the desired modeling conditions for each endpoint (Boundary) and utilize the previously entered parameters that are needed to calculate the transfer of heat through this single pane window.

X model build for the 1D 3 Pane Window Heat Transfer Desktop Display. mph. 55. mph. Now that the model has been saved, the modeler needs to enter the constant values needed for this model. In the Model Builder window of the Desktop Display, Right-Click > Global Definitions > Select Parameters. mph. 5. 5 1D 2 Pane Window Parameters Name Expression Description T_in 70[degF] Interior Temperature T_out 0[degF] Exterior Temperature h_sg 15[W/(m^2*K)] Heat Transfer Coefficient p 1[atm] Air Pressure These entries in the Parameters Entry Table define the interior temperature, the exterior temperature, the heat transfer coefficient, and the air pressure for use in this model.

The dimensions of the “Dead Air Spaces” are such that convection currents are suppressed. Thus, thermal conduction plays the major role in the conduction of heat from the interior surface of the Window to the exterior surface of the Window. Right-Click in the Model Builder window on Materials under Model 1 (mod1). Select > Open Materials Browser. Click the twistie pointing at Built-In in the Material Browser window. Scroll the materials list until Silica glass appears. Right-Click > Silica glass.

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