using buoyantBoussineqPimpleFoam for Laminar free convection
 

Hi everybody
first of all i will describe the model I'm trying to solve and the i will ask my questions
i will be grateful to if any one could help me!
I wanted to model laminar free convection flow in a simple cavity
it is a asymptotic steady-state solution. i mean thermodynamical properties will remain constant except density .
as i found out in forums we should set RASproperties to laminar and turn turbulence to off.
here is my question:
what should we do to insert laminar properties in "0" folder ??
what should we do to Kappa , nut and how we can insert these properties for laminar flows??
thanks in advance!

just delete them!

tnx

then how should i give:
1-thermal conductivity
2-viscosity
and i guess i shoud delete K and epsilon in "0" folder too??
;)
am i right??

in transportProperties located in constant case you can specify nu and Pr number and you can extract the value of k from them.
u have a known Ra number then u should specify Pr and beta and nu in a way that the flow has the specified Rayleigh number

Another question :)
what is the meaning of asymptotic steady state solution ????
what is that??
:eek::eek::eek::eek::eek:

anybody knows how we should set P and P_rgh in "0" ???
in a cavity we can set internal field to atmospheric pressure and zero gradients on walls ??
for P_rgh we should calculate P_rgh=P-rho*g*h , but how we can calculate it over a vertical wall? it varies??