<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; ">A recent question about flow along a conduit that changes shape....<DIV><BR class="khtml-block-placeholder"></DIV><BLOCKQUOTE type="cite"><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Arial" size="4"><SPAN class="Apple-style-span" style="font-size: 13.3px;">I am trying to represent the pressure drop at a sudden enlargement, in a pipe. The pipe initially has a triangular cross section and then an approximately twice larger square cross section.</SPAN></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><BR class="khtml-block-placeholder"></DIV></BLOCKQUOTE><BR><DIV>This description seems like it would require you to setup a network</DIV><DIV>that included two sequential connections using the general conduit</DIV><DIV>component, in each one your would describe the hydrolic diam, roughness</DIV><DIV>and local loss coefficients. Some transitions are listed in the duct design</DIV><DIV>handbooks as being equivalent to a local loss coefficient and if you</DIV><DIV>find one that is close to your situation then include that local loss</DIV><DIV>coefficient with one of the couduit components.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>-ESRU</DIV></BODY></HTML>