Boussinesq model for natural convection
 

I am analysing a problem in a 2D square cavity maintained at different boundary conditions. The flow within the cavity will be circulating due to natural convection. I refered FLUENT tutorial provided at-
https://www.sharcnet.ca/Software/Flu...g/main_pre.htm

however, they enable radiation model first. In my problem I want to neglect radiation since my temperatures are not that high. I can specify the gravity as shown in the tutorial, but I could not get the Boussinesq parameter option. How to use Boussinesq model without enabling radiation effects.

bossenisq model
 

click on materials and then go in materails air there u get the option in density u can select boussenisq model

okay.. so if possible can you clarify what the boussinesq parameter means when we specify operating parameters...

Another thing, in the tutorial it says put density value as 1000kg/m3.. Its actually density of water. I tried searching for explanation for that.. They mentioned refer to user manual.. Can you provide a link for that..

bossenisq model
 

go in materailas click on air and water instead where write air then give the density value and below u hv option change/creat click on it and it gives option overwrite air click no water is added in matrials list