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 Showing results 1 to 25 of 1088 Search took 0.02 seconds. Search: Posts Made By: Tobi
 Forum: OpenFOAM August 1, 2015, 09:04 Replies: 2 Views: 52 Posted By Tobi Exactly, nothing special :) One guy asked me... Exactly, nothing special :) One guy asked me yesterday if I can make it for him and due to the fact it's so simple, I did it last night. Nonetheless I wanted to share it, although it's very simple.
 Forum: OpenFOAM August 1, 2015, 04:56 Replies: 2 Views: 52 Posted By Tobi heatSimpleFoam Hi all, yesterday I implemented the temperature equation and heat flux vector into simpleFoam. I did not test it but feel free to check, use and modify it like you want. ...
 Forum: OpenFOAM July 31, 2015, 05:18 Replies: 5 Views: 122 Posted By Tobi Hi Fabian, at the beginning I was wondering... Hi Fabian, at the beginning I was wondering why its less diffusive but the reason for that is exactly what we are talking about. (U - Urel) ~ 0. I also tried with different schemes, second order,...
 July 25, 2015, 11:43 Replies: 5 Views: 253 Posted By Tobi It's more like: scalar t =... It's more like: scalar t = U.runTime().value(); You only can call runTime().value() with an object. Or maybe with the Namespace::
 July 24, 2015, 02:17 Replies: 16 Views: 9,583 Posted By Tobi Hi, why we introduce divDevReff or... Hi, why we introduce divDevReff or divDevRhoReff is due to the turbulence models. This function is updated in the turbulence-models and can be modified easily. Otherwise you have to reprogramm the...
 July 23, 2015, 12:35 Replies: 502 Views: 27,807 Posted By Tobi Its Not the mixture fraction, it's its Varianz... Its Not the mixture fraction, it's its Varianz ... Zvar is defined between 0 and 0.25 (parabolic profile). No area weight ed interpolation possible. See also...
 Forum: OpenFOAM July 23, 2015, 10:32 Replies: 5 Views: 122 Posted By Tobi Hi chriss, you are right. There is always... Hi chriss, you are right. There is always Diffusion, hence there is only convection. But like you mentioned, I also don't know why I get the better result with mesh motion. Maybe it's due to the...
 Forum: OpenFOAM July 23, 2015, 08:59 Replies: 5 Views: 122 Posted By Tobi Passive scalar is diffusive without mesh motion Hi all, I have a question to all of you. Maybe you are more familiar with that problem. The case is very simple. A 2d rectangular with an outlet velocity of 1m/s, p is fixed at the inlet with...
 July 20, 2015, 16:43 Replies: 1 Views: 58 Posted By Tobi Hi all, solved. Re-programmed all stuff... Hi all, solved. Re-programmed all stuff @home and it work now.
 July 20, 2015, 15:27 Replies: 1 Views: 58 Posted By Tobi icoFoam with density Dear all Foamers, I want to ask for help, because at the moment I get stuck. Problem: I want to make a cavity case in which the bottom is cooled and therefore density change will force flow to...
 July 15, 2015, 15:07 Replies: 16 Views: 9,583 Posted By Tobi divDevRhoReff and divDevReff Hi all, as I read before, there are still some people who are confused about the equations and the behavior of the implemented code. Therefore, I want to make the derivations and want to show you...
 Forum: OpenFOAM July 10, 2015, 07:02 Replies: 0 Views: 88 Posted By Tobi Plastic Modulus Hi all, does anybody know how the plastic modulus is defined? Doing some stress analyzes with foam-extend but I do not know how to set up Ep (plastic modulus) for my material. I do not find any...
 July 2, 2015, 06:38 Replies: 15 Views: 325 Posted By Tobi But your solution gets very diffusive (just as a... But your solution gets very diffusive (just as a hint). Maybe you can switch to a high order scheme after a few timesteps, or even after the solution is converged to improve your gradients.
 Forum: OpenFOAM Pre-Processing July 1, 2015, 01:50 Replies: 4 Views: 145 Posted By Tobi Hi, I also checked the von Mises at the... Hi, I also checked the von Mises at the plateHole but did not get same results. Using that formula: https://upload.wikimedia.org/math/6/6/6/66613de183b344ea370a669dbe4087ab.png I get...
 Forum: OpenFOAM Pre-Processing June 30, 2015, 14:55 Replies: 4 Views: 145 Posted By Tobi Hi Philip, thanks for your replay. I already... Hi Philip, thanks for your replay. I already saw today, that you are using stress solver within openfoam. I will check it out tomorrow but in my case it was a 3d cylinder with a tension force. ...
 Forum: OpenFOAM Pre-Processing June 30, 2015, 09:46 Replies: 4 Views: 145 Posted By Tobi Stress Analyzes, sigmaEq and Von Mises Hi all, I am a bit confused at the moment. Using the solver solidDisplacementFoam and a simple test case (beam with tension; fixed pressure) leads to a sigmaEq which should be the von Mises...
 June 29, 2015, 07:55 Replies: 15 Views: 325 Posted By Tobi Hello Max, 1900 Iterations are not really a... Hello Max, 1900 Iterations are not really a lot of iteration. In my combustion solver I have to run something like 30.000 Iterations till I reach a steady state situation. This always depend on...
 June 29, 2015, 07:48 Replies: 5 Views: 210 Posted By Tobi Hi, normally you should not ask "why this... Hi, normally you should not ask "why this happens" (: Check your results, and then think about it. For me it seems that you choose a BC configuration that allows you to create a pressure...
 June 24, 2015, 09:02 Replies: 5 Views: 210 Posted By Tobi Hi, Boundary Condition for U for... Hi, Boundary Condition for U for the outlet you can use inletOutlet and set inletValue to zero to provide no backflow the rest is okay
 June 23, 2015, 10:15 Replies: 32 Views: 507 Posted By Tobi In the previous post I wanted to say that you... In the previous post I wanted to say that you have to implement it yourself ;) Everything is still included so I know that its not a hard task :) So good luck and keep the community up to date.
 June 23, 2015, 08:38 Replies: 32 Views: 507 Posted By Tobi I think it's a good start. As I mentioned, the... I think it's a good start. As I mentioned, the time resolution is necessary to get the information path (I only read about it, because I never used sonic/supersonic flows). Normally the Pimple loop...
 June 23, 2015, 08:35 Replies: 32 Views: 507 Posted By Tobi Thanks, I already know that, but if you want... Thanks, I already know that, but if you want additional output you have to hard code it :) Back to the topic,... I am not sure if in special cases D0 and D differs if you have alpha = 1. I think...
 June 23, 2015, 06:41 Replies: 32 Views: 507 Posted By Tobi Hi all, dear Chriss, I checked the... Hi all, dear Chriss, I checked the relaxation function and here is the result: ### Case 1 ### Using the following relax dictionary: relaxationFactors { fields
 June 23, 2015, 05:41 Replies: 32 Views: 507 Posted By Tobi Hi Chriss, you are welcomed for discussion.... Hi Chriss, you are welcomed for discussion. Also I learn always new things and repeating is very good for keeping the stuff in mind. Okay as far as you told, you get the point of relaxation, final...
 June 23, 2015, 04:40 Replies: 32 Views: 507 Posted By Tobi So you did not get the point ;) You are using... So you did not get the point ;) You are using relaxation wrong, as mentioned above.
 Showing results 1 to 25 of 1088

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