<div dir="ltr"><div><div>Hi All,<br><br></div>We are trying to build a mesh to simulate external cylinder flow, similar to the one given in the example "ext_cyl". Searching though the documentation, we understand that it is possible to generate several boxes of mesh using genbox and combine using pretex to get the final mesh. <br>
<br></div><div>We are having difficulty in interpreting the boundary condition (BC) strings in the input to files to genbox. It is clear for a rectangular box, the BC string follows the order West, East, South, and North in 2D. What is the analogous interpretation for a circular annulus geometry? such as for the one defined by the box files given in "primer.pdf" (<a href="http://www.mcs.anl.gov/~fischer/primer.pdf">http://www.mcs.anl.gov/~fischer/primer.pdf</a>), which is repeated below:<br>
<br>x2d.rea<br>2 spatial dimension<br>1 number of fields<br>#<br># comments<br>#<br>#<br>#========================================================<br>#<br>Y cYlinder<br>3 -24 1 nelr,nel_theta,nelz<br>.5 .3 x0,y0 - center of cylinder<br>
ccbb descriptors: c-cyl, o-oct, b-box (1 character + space)<br>.5 .55 .7 .8 r0 r1 ... r_nelr<br>0 1 1 theta0/2pi theta1/2pi ratio<br>v ,W ,E ,E , bc’s (3 characters + comma)<br><br><br></div><div>Does "v" corresponds to BC at r0 and W correspond to BC at r_nelr in r-direction and the two E's correspond to BC at theta0 and theta1? <br>
<br></div><div>Thanks in advance for your help.<br><br></div><div>Regards,<br>Ravi<br></div><div><br><br><br><br></div><div><br><br><br></div><div><div><div><br clear="all"><div><div><div><div><div><div><br>-- <br>Ravi Kumar T R<br>
<br>University of Illinois at Urbana-Champaign<br>ph : +1 217 778 7538<br><a href="http://lndvl.mechse.illinois.edu/">http://lndvl.mechse.illinois.edu/</a>
</div></div></div></div></div></div></div></div></div></div>