calculate momentum source(pressure gradient) of turbulent parallel plates flow
 

Dear all,

i would like to CFD turbulent parallel plates flow using LBM
and refer these papers

[1] K. Suga, Y. Kuwata, K. Takashima, and R. Chikasue, “A D3Q27 multiple-relaxation-time lattice Boltzmann method for turbulent flows,” Comput. Math. with Appl., vol. 69, no. 6, pp. 518–529, 2015, doi: 10.1016/j.camwa.2015.01.010.
[2] J. Kim, P. Moin, and R. Moser, “Turbulence statistics in fully developed channel flow at low reynolds number,” J. Fluid Mech., vol. 177, no. 1987, pp. 133–166, 1987, doi: 10.1017/S0022112087000892.

below image(1,2.jpg) is the detail of my CFD set up
and results is 3.jpg

my results higher center velocity and inaccurate at sub layer
so i am doubt grid resolution and momentum source

do i calculate momentum source correctly?
or is there anything i missed?

thank you for your answer