<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
<body>
<div style="color: rgb(33, 33, 33); background-color: rgb(255, 255, 255); text-align: left;" dir="auto">
<br>
</div>
<div style="color: rgb(33, 33, 33); background-color: rgb(255, 255, 255); text-align: left;" dir="auto">
Hi again, the former e-mail is broken and I have</div>
<div style="color: rgb(33, 33, 33); background-color: rgb(255, 255, 255); text-align: left;" dir="auto">
no idea. So I'm re-sending it from my phone, hope this works. Here is the message:</div>
<div style="color: rgb(33, 33, 33); background-color: rgb(255, 255, 255); text-align: left;" dir="auto">
<br>
</div>
<div style="color: rgb(33, 33, 33); background-color: rgb(255, 255, 255); text-align: left;" dir="auto">
Hi there,</div>
<div style="color: rgb(33, 33, 33); background-color: rgb(255, 255, 255);"><br>
</div>
<div style="color: rgb(33, 33, 33); background-color: rgb(255, 255, 255);"> I'm trying to add a uniform background flow field (U=0.1m/s) to my 2D (x-z) simulation, which is laterally homogeneous and vertically uniformly stratified. To avoid obvious noise induced
by flow-topography interaction, I hope the background flow field firstly grow slowly and then remain stable.</div>
<div style="color: rgb(33, 33, 33); background-color: rgb(255, 255, 255);"> I tried to use U_init+OBCS or RBCS to do that, but the results seem not so reasonable. I think the better way is to apply an additional forcing to the rhs of momentum equation (x: -fV;
y: fU). So I altered the 'myPa_TendVelV' to fU in '/pkg/mypackage/mypackage_init_varia.F' and enabled this package and run for 12 hours. The result shows a gorwing U field (0 to 0.03m/s or so generally, bigger or smaller values at topography) but didn't reach
0.1 m/s at the end (12hr modeltime).</div>
<div style="color: rgb(33, 33, 33); background-color: rgb(255, 255, 255);">So,</div>
<div style="color: rgb(33, 33, 33); background-color: rgb(255, 255, 255);"> 1. Is this a right way to adding uniform background field, any way to do this easier?</div>
<div style="color: rgb(33, 33, 33); background-color: rgb(255, 255, 255);"> 2. By RBCS relaxing the flow field also makes U grow gradually from 0 to ~0.1. These show dramatic distinct patterns, which is more reasonable ?</div>
<div style="color: rgb(33, 33, 33); background-color: rgb(255, 255, 255);"><br>
</div>
<div style="color: rgb(33, 33, 33); background-color: rgb(255, 255, 255);">Thanks.</div>
<div style="color: rgb(33, 33, 33); background-color: rgb(255, 255, 255);">Jianing Li</div>
<div style="color: rgb(33, 33, 33); background-color: rgb(255, 255, 255);"><br>
</div>
<div style="color: rgb(33, 33, 33); background-color: rgb(255, 255, 255);"><span style="font-size: 12pt;">&&&this is how I modified 'mypackage'&&&</span></div>
<div style="color: rgb(33, 33, 33); background-color: rgb(255, 255, 255);"># mypackage_init_varia.F:</div>
<div style="color: rgb(33, 33, 33); background-color: rgb(255, 255, 255);">line 50: myPa_TendVelV (i,j,k,bi,bj) = 4.E-6</div>
<div style="color: rgb(33, 33, 33); background-color: rgb(255, 255, 255);"><br>
</div>
<div style="color: rgb(33, 33, 33); background-color: rgb(255, 255, 255);"># MYPACKAGE_OPTIONS.h</div>
<div style="color: rgb(33, 33, 33); background-color: rgb(255, 255, 255);">line 14: #undef MYPACKAGE_2D_STATE</div>
<div style="color: rgb(33, 33, 33); background-color: rgb(255, 255, 255);"><br>
</div>
<div style="color: rgb(33, 33, 33); background-color: rgb(255, 255, 255);">#data.mypackage(whole file):</div>
<div style="color: rgb(33, 33, 33); background-color: rgb(255, 255, 255);">&MYPACKAGE_PARM01</div>
<div style="color: rgb(33, 33, 33); background-color: rgb(255, 255, 255);">myPa_MNC=.FALSE.,</div>
<div style="color: rgb(33, 33, 33); background-color: rgb(255, 255, 255);">myPa_applyTendU=.TRUE.,</div>
<div style="color: rgb(33, 33, 33); background-color: rgb(255, 255, 255);">myPa_applyTendV=.TRUE.,</div>
<div style="color: rgb(33, 33, 33); background-color: rgb(255, 255, 255);"> &</div>
<div style="color: rgb(33, 33, 33); background-color: rgb(255, 255, 255);"><br>
</div>
<div id="ms-outlook-mobile-signature">
<div><br>
</div>
·¢ËÍ×Ô <a href="https://aka.ms/blhgte">Outlook Mobile</a></div>
</body>
</html>