<div dir="ltr"><div><div><div>Hi nek users, <br><br></div>I am encountering a strange
issue. Build on the example of cylinder flow, I write a matlab script to
generate the Cartesian mesh and a genbox script to generate the mesh
around the cylinder. When the domain is small, the code runs. When I
increases the domain size and cell numbers, the calculation blows up
after several steps? <br>
<br>See the picture attached here, there is a singular point on the
boundary for the pressure. But the velociy is ok, since I imposed a
uniform flow for inlet and top bottom. <br><br></div>It also sometimes shows another error, the problem size is too large, even I run them in 32 procs instead of 4 as usual. <br>
</div><div><br></div><div>Here attached the output of nek. <br></div><div><br></div><div>Does someone have an idea? <br><br></div>Best regards<div class=""><div id=":60f" class="" tabindex="0"><img class="" src="https://mail.google.com/mail/u/0/images/cleardot.gif"><br>
</div><div id=":60f" class="" tabindex="0">Tubois<br></div></div></div>