Hi All, I need to use two different Reynolds in the same case as two velocity inputs, my case is incompressible case, if I defined rho and Kinematic viscosity and change inlet speeds is it ok like OpenFoam and does not define Re like this: <!-- <P> Re = 150 </P> --> <!-- commented --> <P> rhoInf = 1.2041 </P> <!-- air density at 20 c --> <P> Kinvis = 0.000015111 </P> -------- <REGION REF="0"> <!-- Inlet_upper --> <D VAR="u" VALUE="0.00226665" /> <!-- Re 150 R --> <D VAR="v" VALUE="0" /> <N VAR="p" USERDEFINEDTYPE="H" VALUE="0"/> </REGION> <REGION REF="1"> <!-- Inlet_lower --> <D VAR="u" VALUE="0.000846216" /> <!-- Re 56 R --> <D VAR="v" VALUE="0" /> <N VAR="p" USERDEFINEDTYPE="H" VALUE="0"/> </REGION> ----------------------- and calculate real two velocities and put it in the inlet speeds, is this ok Regards,