[Nek5000-users] pipe turbulence

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

actually, I would recommend a tripping as described in Schlatter and 
Orlu (JFM 2012) and Vinuesa et al. (J. Turbulence 2014). Alternatives 
are of course random initial conditions (but be careful with the choice 
of axial/azimuthal scales!), or potentially the synthetic eddy method.

Single phase turbulent pipe flow is possible in Nek5000, see e.g. the 
paper El Khoury et al. (Flow Turbulence and Combustion, 2013).

Philipp

On 2017-12-11 19:31, nek5000-users at lists.mcs.anl.gov wrote:
> ZJ,
> 
> did you look at the pipe example in Nek5000? I believe you have to add an initial perturbation to trigger the turbulent flow. What type of boundary conditions are you using?
> 
> Marco
> 
>> On Dec 11, 2017, at 1:25 PM, nek5000-users at lists.mcs.anl.gov wrote:
>>
>> Hi Nek,
>>
>> For the single phase pipe flow, I set bulk reynolds number equals to 25000, but still no turbulence in the pipe after running for over 10,000 timesteps. Is there anyone know what's going on the pipe.
>>
>> Best wishes,
>>
>> ZJ
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