Dear All, In a stenosed pipe flow problem, I specify parabolic velocity profile u=2*(1−(r^2)), where r=sqrt(y^2+z^2) as seen below. /*<BOUNDARYREGIONS>*//* *//* <B ID="0"> C[7] </B> <!-- Inlet -->*//* *//* <B ID="1"> C[9] </B> <!-- Outlet -->*//* *//* <B ID="2"> C[8] </B> <!-- Wall -->*//* *//* </BOUNDARYREGIONS>*//* *//* *//* <BOUNDARYCONDITIONS>*//* *//* <REGION REF="0">*//* *//* <D VAR="u" VALUE="2*(1-(rad(y,z)^2))" />*//* *//* <D VAR="v" VALUE="0" />*//* *//* <D VAR="w" VALUE="0" />*//* *//* <N VAR="p" USERDEFINEDTYPE="H" VALUE="0" />*//* *//* </REGION>*//* *//* <REGION REF="1">*//* *//* <N VAR="u" VALUE="0" />*//* *//* <N VAR="v" VALUE="0" />*//* *//* <N VAR="w" VALUE="0" />*//* *//* <D VAR="p" VALUE="0" />*//* *//* </REGION>*//* *//* <REGION REF="2">*//* *//* <D VAR="u" VALUE="0" />*//* *//* <D VAR="v" VALUE="0" />*//* *//* <D VAR="w" VALUE="0" />*//* *//* <N VAR="p" USERDEFINEDTYPE="H" VALUE="0" />*//* *//* </REGION>*//* *//* </BOUNDARYCONDITIONS>*//**/ However, since u=0 at wall of the pipe due to no slip boundary condition definition, the calculated value of parabolic velocity profile at the wall (u = 1.5 ) can not be achieved. Is there any way to overcome this problem? Regards, Kamil