Dear friends,
I want to apply heat flux inthermal simulation using LBM…
I’ve used this formulae:
T(i,1)= (q"/k)2/3deltax+4/3T(i,2)-1/3T(i,3)
in which i is the directions and T(i,1) is the directional temperatue on wall, T(i,2)&T(i,3) are the directional temperatures on one node and two nodes above the that respectively. I distribute the heat flux along the directions based on their weights:
for example:
T(0,1)= (4/9q"/k)2/3deltax+4/3T(0,2)-1/3T(0,3)
T(1,1)= (1/9q"/k)2/3deltax+4/3T(1,2)-1/3T(1,3)
T(2,1)= (1/9q"/k)2/3deltax+4/3T(2,2)-1/3T(2,3)
T(4,1)= (1/9q"/k)2/3deltax+4/3T(4,2)-1/3T(4,3)
T(5,1)= (1/36q"/k)2/3deltax+4/3T(5,2)-1/3T(5,3)
T(7,1)= (1/36q"/k)2/3deltax+4/3T(7,2)-1/3T(7,3)
However, when I want to calculate the local Nusselt number which calculates through the following formulae:
Nu=(T-Tref)/(q"*l/k)
the Nu number is obtained high number which does not corroborate the classical CFD…
is this algorithm correct!!!
I’d really appreciate if you can give me a good refrence or article pertaining to modeling heat flux using LBM…
Or
help me…
Many thanks in advance…
cheers