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Tutorial Thermal+Structural analysis in SimLab after Feko simulation

Electromagnetic losses, computed by Feko, become volume heat loads and surface heat fluxes in SimLab. There, OptiStruct is used for the subsequent thermal simulation followed by thermal stress and deformation.

This tutorial explains the detailed steps in SimLab. It is intended for Feko users who are not familiar yet with SimLab.

TutorialSimLabThermal_after_Feko.zip

The other tutorial teaches how to set up and run a transient thermal simulation in SimLab OptiStruct, based on Feko results.

Feko_SimLabOptiStruct_TransientThermal.zip

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Feko

SimLab

v2025.1

Comments

TriV

Do you have an example to use SAR as the heat source to solve the Pennes' bioheat equation?

Thanks.

mvogel

TemperatureCalculator.zip

Good question! The standard thermal phenomena in our simulators are conduction, convection and thermal radiation. For bio-medical applications, you want to include blood perfusion (heat removed from an organ by the blood flow) and metabolic heat (heat generated in an organ by metabolic processes). To my knowledge, our solvers don't include those, but the attached POSTFEKO script includes all the mechanisms.

The script requires the field results in POSTFEKO on a large, dense, regular 3D grid (hence, you request those in advance in CADFEKO). The script then performs a kind of thermal finite-difference time stepping to produce the temperatures as a function of time. Caution: the method is not implicitly stable, so if time steps are too large (or a thermal conductivity is set too large), the result can blow up. The good news is that you would always recognize that; it would not converge to a finite-but-wrong result. For metal objects, if is wise to bend the rules and specify a modest thermal conductivity.

I hope this helps. You can contact me at mvogel@altair.com for questions, so we won't make this posted community conversation too long.

mvogel

Adding a tutorial with a transient-thermal simulation in SimLab-OptiStruct, with special thanks to Katelyn Hunter.