<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style type="text/css" style="display:none;"><!-- P {margin-top:0;margin-bottom:0;} --></style>
</head>
<body dir="ltr">
<div id="divtagdefaultwrapper" dir="ltr" style="font-size:12pt; color:#000000; font-family:Calibri,Arial,Helvetica,sans-serif">
<p>Dear Neks,</p>
<p><br>
</p>
<p>Recently I have been running test simulations of an angled square duct. A sketch is shown below. The shapes of the inlet and outlet are identical. <span>The actual domain is longer than shown here.
</span></p>
<p> ____________________</p>
<p>| \</p>
<p>| _________________ \</p>
<p> \ \</p>
<p> \ \</p>
<p> \ \</p>
<p> \ /</p>
<p> \ /</p>
<p>Simulations with velocity inlet and outflow conditions worked well. Now I want to set up periodic boundary conditions at the inlet and outlet. I'm wondering how can I maintain a constant flow rate in this simulation?</p>
<p>In the normal periodic channel flow simulation, setting parameters p54 and p55 ensures a constant mean velocity. But in my case, the flow changes direction. Does anyone know how to set constant flow rate/mean velocity in this type of simulation?</p>
<p><br>
</p>
<p>Thank you very much in advance.</p>
<p><br>
</p>
<p>Kind regards,</p>
<p>Tony<br>
</p>
</div>
</body>
</html>