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Search took 0.00 seconds. Search: Posts Made By: arjun
Forum: Main CFD Forum July 22, 2017, 03:27
Replies: 30
Views: 4,526
Posted By arjun
Uploaded a video tutorial outlining a simple...

Uploaded a video tutorial outlining a simple workflow with FVUS Wildkatze.

https://youtu.be/tgB8wedPhpA

Please use the highest resolution on youtube to see it clearly

NOTE

The pdf and...
Forum: Main CFD Forum May 30, 2017, 22:53
Replies: 30
Views: 4,526
Posted By arjun
FVUS Release 1.2 Beta is available from today to...

FVUS Release 1.2 Beta is available from today to be downloaded from (http://www.dravvya.co.in)www.dravvya.co.in (http://www.dravvya.co.in)

Additions

Reactive Flow


ReactingSpeciesModel...
Forum: Main CFD Forum May 25, 2017, 07:36
Replies: 30
Views: 4,526
Posted By arjun
Thank you I try to follow it. By a quick...

Thank you I try to follow it.

By a quick glance saw an interesting comment about Fluent's bounded scheme that it had dissipation. Will see how FVUS does. Thank you again.


PS: Also got your...
Forum: Main CFD Forum May 25, 2017, 07:15
Replies: 30
Views: 4,526
Posted By arjun
This is extremely useful in many ways. I thank...

This is extremely useful in many ways. I thank you for this.

I see that you are one of the authors, so if you have mesh lying around then it would be even better as apples to apples comparison...
Forum: Main CFD Forum May 25, 2017, 06:52
Replies: 30
Views: 4,526
Posted By arjun
I probably get some time in first week of june....

I probably get some time in first week of june. Do you have any preference for the test case. I see if I could do that.

Also



At the moment unbounded or unlimited versions are not...
Forum: Main CFD Forum May 24, 2017, 18:42
Replies: 30
Views: 4,526
Posted By arjun
Simple tests are done but i think a more serious...

Simple tests are done but i think a more serious test needs to be done.

I take it up and also need to add the inflow turbulence generator.
Forum: Main CFD Forum May 24, 2017, 17:34
Replies: 30
Views: 4,526
Posted By arjun
Dynamic SGS is available in the version about to...

Dynamic SGS is available in the version about to be released in a week or so.

Fluent has transport equation for k based LES too along with dynamic procedure.

This needs to be added as...
Forum: Main CFD Forum May 22, 2017, 00:25
Replies: 30
Views: 4,526
Posted By arjun
Link to video version of tutorial for H2 auto...

Link to video version of tutorial for H2 auto ignition case that shows how to set up reacting flow problem.

This video also gives some idea of how to use FVUS/wildkatze in video form.
...
Forum: Main CFD Forum April 21, 2017, 06:57
Replies: 30
Views: 4,526
Posted By arjun
Update of Reacting flows

Attaching validation results for CH4 - Air auto ignition.
Initial temperature is 1500K and Pressure is 1Bar.

Mechanism use is GRI 3.0 mechanism from...
Forum: Main CFD Forum March 9, 2017, 01:36
Replies: 30
Views: 4,526
Posted By arjun
Added explicit version of Navier Stokes solver to...

Added explicit version of Navier Stokes solver to deal with small time step sizes.

Here is basic ignition test for combustion

8e-4 x 8e-4 m grid dimentions, filled with air at 20mPa at 700K....
Forum: Main CFD Forum February 23, 2017, 02:01
Replies: 30
Views: 4,526
Posted By arjun
Started chemkin type project for FVUS, it is...

Started chemkin type project for FVUS, it is called firekatze for chemical reactions and combustion.


Developed ODE stiff equation solver based on VODE solver for firekatze:




Along with...
Forum: Main CFD Forum January 15, 2017, 23:08
Replies: 30
Views: 4,526
Posted By arjun
partial regions

With FVUS, I have introduced another concept to tackle some of the advanced issues that sometimes come up.

Partial regions.

In FVUS one can create partial regions from a full region. It is...
Forum: Main CFD Forum January 15, 2017, 22:54
Replies: 30
Views: 4,526
Posted By arjun
To add on previous comments. To solve this...

To add on previous comments. To solve this particular issue, the phase in wildkatze is something that holds memory for variables pertaining to that particular field. That also acts as phase in the...
Forum: Main CFD Forum January 15, 2017, 04:53
Replies: 30
Views: 4,526
Posted By arjun
I would say that download the default version and...

I would say that download the default version and play with windows version because it is easy to run as no installation is required.

For the very first run, go to the tutorial folder and copy...
Forum: Main CFD Forum January 15, 2017, 04:30
Replies: 30
Views: 4,526
Posted By arjun
First have a look at the gui for a typical set...

First have a look at the gui for a typical set up. See attached picture.


As user defines sets of regions and sets of phases and we wish to apply physics models based on it with given...
Forum: Main CFD Forum January 15, 2017, 04:22
Replies: 30
Views: 4,526
Posted By arjun
You have pointed out some of the problems, there...

You have pointed out some of the problems, there are lot more issues to be taken care of.


1. How to add physics models such that they are applicable to the region set and phase set they are...
Forum: Main CFD Forum January 14, 2017, 21:31
Replies: 30
Views: 4,526
Posted By arjun
Yes. It would be good idea. I have lot to say...

Yes. It would be good idea.
I have lot to say on it. Previously when i worked in japan I spent almost 3 years with it and did tackle (solve? ) some of the issues with immersed boundary.
some...
Forum: Main CFD Forum January 9, 2017, 23:40
Replies: 30
Views: 4,526
Posted By arjun
Future and what to expect Immediate concern...

Future and what to expect

Immediate concern for me at the moment is to provide an explicit type of overset mesh solver. This seems like easy to implement and allows flexibility in simulations...
Forum: Main CFD Forum January 9, 2017, 23:38
Replies: 30
Views: 4,526
Posted By arjun
Multiphase Methods Current version of...

Multiphase Methods

Current version of FVUS supports Mixture multiphase method based on algebraic drift flux model and VOF method.
For VOF method interface is resolved via HRIC or W-THINC...
Forum: Main CFD Forum January 9, 2017, 23:35
Replies: 30
Views: 4,526
Posted By arjun
Flow Solver Flow is solved with...

Flow Solver

Flow is solved with collocated SIMPLE method suitable for unstructured grids. Convection terms are treated with one of the three methods: Upwind, Second Order Upwind and CUBISTA...
Forum: Main CFD Forum January 9, 2017, 23:31
Replies: 30
Views: 4,526
Posted By arjun
Motion and Immersed Boundary Methods ...

Motion and Immersed Boundary Methods

FVUS allows user to connect various regions via generalized grid grid interface where grids could be unmatched. Linear system for each model that uses...
Forum: Main CFD Forum January 9, 2017, 23:29
Replies: 30
Views: 4,526
Posted By arjun
FVUS Solver

FVUS Solver


Steady/Transient
FVUS Solver provides steady as well as unsteady simulations (Implicit Euler and 3 Time Level 2nd Order Scheme) with iterative as well as fractional (or...
Forum: Main CFD Forum January 9, 2017, 23:27
Replies: 30
Views: 4,526
Posted By arjun
General Philosophy of FVUS

General Philosophy of FVUS


It starts with a very general question how to perform a multi-physics simulation involving one or more phases on/in a multi-region grid/mesh. The...
Forum: Main CFD Forum January 9, 2017, 23:25
Replies: 30
Views: 4,526
Posted By arjun
FVUS (Finite Volume Utilities and Solvers) / Wildkatze (solver) Updates

This is a small note introducing FVUS (Finite Volume Utilities and Solvers) / Wildkatze.

This is a thread I wish to maintain to update about FVUS/Wildkatze for the people who wish to follow...
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