[Nek5000-users] Need for clarification

nek5000-users at lists.mcs.anl.gov nek5000-users at lists.mcs.anl.gov
Mon Feb 1 09:21:33 CST 2016


Hi Prasanth,

Nek solves the navier-stokes equation in dimensional form. So, you can
design your geometry in such a way such that your defined length scale L =
1, and your defined velocity scale U = 1 as well. So your Reynolds number =
U L / nu = 1/nu.

So,if you put P02 = -nu, it will be read as 1/nu.

Best Regards,
Tanmoy

On Mon, Feb 1, 2016 at 1:52 AM, <nek5000-users at lists.mcs.anl.gov> wrote:

> Dear Sir
>
> Thank you for clarifying my doubts. Please forgive me, if you feel the
> questions I am posting are quite simple. I have just started to learn
> this.
>
> I have one more question in mind & it needs your guidance Sir.
> In the ".rea file", in the parameter list we have P01 & P02 for density
> and Reynolds number respectively. Its given in the manual that, when P02 is
> either negative or positive it will be treated as Reynolds number or
> reciprocal of Reynolds number. If so, where shall I define my kinematic
> viscocity?
>
> T/R
> Prashanth Mohanasundaram
>
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