[Nek5000-users] Small random perturbations

[nek5000-users at lists.mcs.anl.gov]

Dear Ali,


This is definitely strange and not usual behavior.


How are you increasing your resolution?  Are you moving to a new mesh?   Are you simply changing lx1 in the SIZE file?


How many elements are you using now and what order lx1 ?


What is your Re?


Best,

Paul


________________________________
From: Nek5000-users <nek5000-users-bounces at lists.mcs.anl.gov> on behalf of nek5000-users at lists.mcs.anl.gov <nek5000-users at lists.mcs.anl.gov>
Sent: Thursday, March 8, 2018 9:18:02 AM
To: nek5000-users at lists.mcs.anl.gov
Subject: [Nek5000-users] Small random perturbations


Dear all

First, many thanks for your response. I couldn't be more thankful.
Either by starting with high Reynolds number or by using initial noise is working now. However, once I increase the resolution the turbulence decays and disappears completely, and I don't know why? I just wanted to make grid independence and my geometry is very small, 10 cm in axial direction & 1 cm along the radius.

Any idea is greatly appreciable.
Ali

https://lists.mcs.anl.gov/pipermail/nek5000-users/2018-March/005126.html


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