[benqing]

hi everybody

Recently，I have simulationed square duct flow with new turbulence model，but there are some problem.
the BC in x direction is cyclic, in yz direction is wall,it’s very simple.And there is a fixed mean flow velocity in x direction,using pressureGradientExplicitSource in fvoption ,the pressure gradient is calculated automatically
first，the result is reasonable when i run the case with RANS model,

pressure gradient = 0.179097

but pressure gradient become very small when i run the case with new turbulence model

pressure gradient = 0.0903267

the new turbulence model has already been verified in case of channel395，but in present case the pressure gradient become very small,could anyone help me ？


benqing