[Nek5000-users] rst to ix iy iz

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

Hi,
yes, I think that for Lagrangian particle tracking such a regularisation 
is absolutely needed such that the force field is smooth, and peaks in 
the actual location of the particle. Depending on the function one uses 
to distribute the force, one does not need to calculate the indices. 
There are a couple of references in the literature that do such an 
approach, see e.g. Zhao, Andersson and Gillissen, 2010.

Philipp

On 2018-09-19 21:06, nek5000-users at lists.mcs.anl.gov wrote:
> Dear Philipp,
> 
> Thanks for your your suggestion to correct my model which I really 
> appreciate. I want to explain what I am doing and could you please give 
> me some advice. Thanks so much.
> 
> Now I am doing a Lagrangian particle tracking model with two-way 
> coupling. So the interaction between two phases in my mind, should be 
> added to the Eulerian grid point where the particle is, and the grid 
> point where it belongs to is what I was finding out. I am sorry to say 
> that I don't totally understand the the regularising the force among a 
> number of grid points. I read some IBM papers before. If I were correct, 
> I think the regularised function is employed with interpolating velocity 
> and regularising force among adjacent grid points to keep the interface 
> smooth. Do you think for my piont-particle tracking the regularising is 
> needed? Would you please give me any suggestions?
> 
> Kind regards,
> 
> Jian
> 
> 
> 
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