<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_1_1429564703942_7898">Hi,</div><div id="yui_3_16_0_1_1429564703942_7899" dir="ltr">Is there any problem to specify a fixed pressure gradient rather than fixed flow rate?</div><div dir="ltr">I want to simulate a channel flow of non-Newtonian fluids, and it is easier to use pressure gradient.</div><div dir="ltr"><br></div><div id="yui_3_16_0_1_1429564703942_7900" dir="ltr">Hamid<br></div><div id="yui_3_16_0_1_1429564703942_7856"><br></div></div></body></html>