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Showing results 1 to 9 of 9 Search took 0.00 seconds. Search: Posts Made By: cfdnewbie

Forum: Main CFD Forum September 6, 2011, 08:54

Replies: 17 how i can solve this unsteady problem Views: 2,098 Posted By cfdnewbie Ok, good question...you would have to compute the... Ok, good question...you would have to compute the pressure from your state variables, so vorticity and the other thing in each step. I haven't done this before, there might be an easier way. I...

Forum: Main CFD Forum September 6, 2011, 08:25

Replies: 17 how i can solve this unsteady problem Views: 2,098 Posted By cfdnewbie Ok, I will try again: Write your equation... Ok, I will try again: Write your equation as du/dt +R(u)=0. R(u) contains all spatial derivatives. U is your vector of solution variables, so vorticity and whatever else for you. 1) You start...

Forum: Main CFD Forum September 6, 2011, 07:53

Replies: 17 how i can solve this unsteady problem Views: 2,098 Posted By cfdnewbie ok, I'm all relaxed again :=) I guess I... ok, I'm all relaxed again :=) I guess I don't understand your remark from above: my problem is that my both eqn are dependent to each other If you solve the NS equations in standard...

Forum: Main CFD Forum September 6, 2011, 04:00

Replies: 17 how i can solve this unsteady problem Views: 2,098 Posted By cfdnewbie uh...:confused::confused::confused:... Navier... uh...:confused::confused::confused:... Navier Stokes equations or Euler equations are also dependent on one another... so I guess I don't understand your problem??

Forum: Main CFD Forum September 5, 2011, 05:37

Replies: 17 how i can solve this unsteady problem Views: 2,098 Posted By cfdnewbie Well, you have to write your equations in that... Well, you have to write your equations in that form (just 1d, scalar example): du/dt + R(u)=0, where all the spatial derivatives go into R(u). That can be first, second, or any order...

Forum: Main CFD Forum September 5, 2011, 03:30

Replies: 17 how i can solve this unsteady problem Views: 2,098 Posted By cfdnewbie I guess you mean "Gauss" ;) Could you tell me... I guess you mean "Gauss" ;) Could you tell me what psi and omega are? I'm not familiar with that notation.... Here is what you have to do: the equation you want to solve is/must be written in...

Forum: Main CFD Forum September 5, 2011, 03:10

Replies: 17 how i can solve this unsteady problem Views: 2,098 Posted By cfdnewbie No, I don't, but if you already HAVE a FD code... No, I don't, but if you already HAVE a FD code which solves the time integration in a pseudo timestepping, you are done....that's why you need to state what time integration you use in your steady...

Forum: Main CFD Forum September 4, 2011, 14:10

Replies: 17 how i can solve this unsteady problem Views: 2,098 Posted By cfdnewbie So if I understand you correctly, you already... So if I understand you correctly, you already have an explicit FD solver which you use to do pseudo timestepping to steady state? if that's the case, you are almost already there...

Forum: Main CFD Forum September 4, 2011, 07:06

Replies: 17 how i can solve this unsteady problem Views: 2,098 Posted By cfdnewbie are you asking for help programming an unsteady... are you asking for help programming an unsteady solver or using an existing one??

Showing results 1 to 9 of 9

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