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Showing results 1 to 15 of 15 Search took 0.00 seconds. Search: Posts Made By: srakshit

Forum: OpenFOAM August 4, 2011, 19:40

Replies: 50 Can anybody please check my boundary conditions? Views: 5,894 Posted By srakshit It does, try decreasing the deltaT. Also,... It does, try decreasing the deltaT. Also, check your ddtSchemes in fvSchemes.

Forum: OpenFOAM August 3, 2011, 22:53

Replies: 50 Can anybody please check my boundary conditions? Views: 5,894 Posted By srakshit Out of pressure and velocity you can define one.... Out of pressure and velocity you can define one. If you have defined velocity at inlet and outlet as 30 m/s, then i wont prefer setting pressure = 0. This is because of 2 reasons 1. If at the...

Forum: OpenFOAM August 3, 2011, 08:16

Replies: 50 Can anybody please check my boundary conditions? Views: 5,894 Posted By srakshit Try these boundary settings for pressure ... Try these boundary settings for pressure inlet { type freestreamPressure; } outlet

Forum: OpenFOAM August 3, 2011, 08:02

Replies: 50 Can anybody please check my boundary conditions? Views: 5,894 Posted By srakshit what boundary condition you are using for outlet?... what boundary condition you are using for outlet? Also what pRefValue you are using?

Forum: OpenFOAM August 3, 2011, 07:56

Replies: 50 Can anybody please check my boundary conditions? Views: 5,894 Posted By srakshit its because the velocity = 30 m/s at inlet. ... its because the velocity = 30 m/s at inlet. what is the outlet velocity boundary in this case?

Forum: OpenFOAM August 3, 2011, 07:10

Replies: 50 Can anybody please check my boundary conditions? Views: 5,894 Posted By srakshit I do not think the pressure specified in the... I do not think the pressure specified in the solver is relative. So u should either keep it floating or keep the absolute pressure.

Forum: OpenFOAM August 3, 2011, 07:04

Replies: 50 Can anybody please check my boundary conditions? Views: 5,894 Posted By srakshit But why inlet is fixed at zero now? Change in to... But why inlet is fixed at zero now? Change in to zeroGradient You have 30 m/s constant flow. Just tell me one thing if U at inlet is 30 m/s and Pressure is zero in that patch...is it consistent?

Forum: OpenFOAM August 3, 2011, 04:47

Replies: 50 Can anybody please check my boundary conditions? Views: 5,894 Posted By srakshit Why the outlet pressure is set fixedValue = zero?... Why the outlet pressure is set fixedValue = zero? It should be zeroGradient.

Forum: OpenFOAM July 30, 2011, 23:12

Replies: 50 Can anybody please check my boundary conditions? Views: 5,894 Posted By srakshit Yes, you can try setting the outlet pressure at... Yes, you can try setting the outlet pressure at freeStream.

Forum: OpenFOAM July 27, 2011, 03:24

Replies: 50 Can anybody please check my boundary conditions? Views: 5,894 Posted By srakshit For an unsteady analysis, zero gradient for both... For an unsteady analysis, zero gradient for both pressure and velocity will be fine. But for steady state study, its better to have a steady state boundary for both inlet and outlet.

Forum: OpenFOAM July 27, 2011, 02:51

Replies: 50 Can anybody please check my boundary conditions? Views: 5,894 Posted By srakshit Are you validating some experiments? If the... Are you validating some experiments? If the pressure is unknown, you should define the velocity at the boundary. Keeping both of them floating is inconsistent. Since this is a steady state...

Forum: OpenFOAM July 26, 2011, 16:55

Replies: 50 Can anybody please check my boundary conditions? Views: 5,894 Posted By srakshit ok...since you are doing flow past a cylinder... ok...since you are doing flow past a cylinder with 30 m/s velocity. Your inlet boundary is consistent (since Velocity is initialized and pressure is kept floating). Problem is with your outflow...

Forum: OpenFOAM July 26, 2011, 15:59

Replies: 50 Can anybody please check my boundary conditions? Views: 5,894 Posted By srakshit If your domain is 1 cell thick in z direction,... If your domain is 1 cell thick in z direction, then keeping the frontAndBack patch as 'empty' will reduce the computational efforts (it wont solve U for that direction). Otherwise, i dont think it...

Forum: OpenFOAM July 25, 2011, 17:13

Replies: 50 Can anybody please check my boundary conditions? Views: 5,894 Posted By srakshit Yes, I agree with MasterCooler. Out of U and p,... Yes, I agree with MasterCooler. Out of U and p, one value should be fixed for either inlet or outlet.

Forum: OpenFOAM July 25, 2011, 16:12

Replies: 50 Can anybody please check my boundary conditions? Views: 5,894 Posted By srakshit In your setting,the velocity inlet is at 30 m/s... In your setting,the velocity inlet is at 30 m/s but the outlet is at zeroGradient. This is creating the problem in your domain. keep the velocity constant at 30 m/s.

Showing results 1 to 15 of 15

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