Density when the boussinesq assumption is used

[POSThu]

Dear all,

I am doing some thermal cases simulation by OpenLB, and there is a question. As we all know, the density of air is varied with the temperature. So, which density should be specified in the Thermal Unitconverter? Is it the density corresponding to the low temerature?

Best regards,
mengqiang

[mgaedtke]

Hi mengqiang,

you should use the reference density, which is in most cases given by the density at mean temperature.

Best,
Max

[Author]

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