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Search: Posts Made By: arjun
Forum: Main CFD Forum December 2, 2022, 04:29
Replies: 46
Views: 7,189
Posted By arjun
When I say easy here, I meant it comes more...

When I say easy here, I meant it comes more naturally in this framework. As far as numerical difficulty goes, I am not sure because this depends on implementation.
Forum: Main CFD Forum December 2, 2022, 02:19
Replies: 46
Views: 7,189
Posted By arjun
Now that I have little bit time. Let me point...

Now that I have little bit time. Let me point out three areas where Lattice Boltzmann methods have advantages over the traditional method. This can be useful because most of these points are bit...
Forum: Main CFD Forum November 28, 2022, 07:43
Replies: 46
Views: 7,189
Posted By arjun
As I mentioned earlier we have run this type of...

As I mentioned earlier we have run this type of calculations till 3 to 4 billion cells and this is what we did:

1. One does not need to save the whole data set. We were interested in probe line...
Forum: Main CFD Forum November 21, 2022, 13:04
Replies: 46
Views: 7,189
Posted By arjun
Naa not really. Its just that the same...

Naa not really.

Its just that the same discussion that we have had last 15 years. LBM code is fast and it will take over world.


This keep coming in various forms and answer is that it has...
Forum: Main CFD Forum November 21, 2022, 09:16
Replies: 46
Views: 7,189
Posted By arjun
1. Last auto CFD workshop they provided the...

1. Last auto CFD workshop they provided the grids for the car and it took 4 hours (200million cells) to get the results out. The results match good with the experimental values so why would i spend...
Forum: Main CFD Forum November 14, 2022, 00:32
Replies: 46
Views: 7,189
Posted By arjun
Numerically for them, LES means they have to...

Numerically for them, LES means they have to change the effective viscosity. That means they need to vary the relaxation parameter which decides effective viscosity. What is not clear though how...
Forum: Main CFD Forum November 13, 2022, 02:25
Replies: 46
Views: 7,189
Posted By arjun
You can have LES etc in LBM too. I will forward...

You can have LES etc in LBM too. I will forward you (on telegram) one of the pdfs that i used to have. If i remember correctly they talked about it.
Forum: Main CFD Forum November 12, 2022, 00:36
Replies: 46
Views: 7,189
Posted By arjun
Having written and studied (and even considered...

Having written and studied (and even considered lbm for our own work) i can tell you that it can be very efficient in certain cases. However there are few major issues

1. As the Reynolds number...
Forum: Main CFD Forum November 10, 2022, 07:20
Replies: 46
Views: 7,189
Posted By arjun
We personally moved to our own code because...

We personally moved to our own code because commercial tools did not cut it. We got good results compared to experiments with our own codes.


You brought a good question though. Accuracy is...
Forum: Main CFD Forum November 10, 2022, 02:14
Replies: 46
Views: 7,189
Posted By arjun
All these things assume that someone else has to...

All these things assume that someone else has to do the same in other environment. But most of the time they do not have to do the same to achieve same or similar results.

I worked on golf ball...
Forum: Main CFD Forum November 9, 2022, 12:18
Replies: 46
Views: 7,189
Posted By arjun
Well powerFlow can be stable at much much higher...

Well powerFlow can be stable at much much higher time-step sizes thats where it shines. If there is a gpu version of PowerFlow then it will leave it in dust based on what i have seen so far from...
Forum: Main CFD Forum November 9, 2022, 11:12
Replies: 46
Views: 7,189
Posted By arjun
If you assume same mesh then may be but other...

If you assume same mesh then may be but other solvers do not need same mesh for same accuracy. For example take higher order solvers, they can do the same thing in much much coarser meshes.

Also...
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