atanuchaudhury1994@gmail.com
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May 16, 2024 at 9:13 pm in reply to: Error on Cylinder2D example on Fringe technique implementation. #8710atanuchaudhury1994@gmail.comParticipant
Can you please tell me which example of OpenLB has implemented Fringe technique. Suggest me an example. PLease help.
Thank you
May 16, 2024 at 7:12 pm in reply to: Regarding implementation fringe region technique in Cylinder2d code. #8707atanuchaudhury1994@gmail.comParticipantThank you for the reply. But my contour is Cylinder2D, so should I use Frindge2D in place of Fringe3D here:
Fringe3D fringeForceCoefficients(wantedVelocity, lz-10*ly/N, lz, 0., 0.008); //lz is the furter end of the…
atanuchaudhury1994@gmail.comParticipantThank you
atanuchaudhury1994@gmail.comParticipantthank you
atanuchaudhury1994@gmail.comParticipantThank you for your reply. I have seen the nozzle3d problem, here some things that I found:
“Dynamics”
// Choose your turbulent model of choice
//#define USE_RLB
#define USE_SMAGORINSKY //default
//#define USE_CONSISTENT_STRAIN_SMAGORINSKY
//#define USE_SHEAR_SMAGORINSKY
//#define USE_KRAUSE#ifdef USE_SHEAR_SMAGORINSKY
using DESCRIPTOR = D3Q19<AV_SHEAR>;
#else
using DESCRIPTOR = D3Q19<>;
#endif
and the other part in the “void prepareLattice”. Should I have to change the Cylinder2D code like this? Other tha the “Dynamics”, do I need to change any other part of the code ? Please tell me.Thank you
May 8, 2024 at 7:16 am in reply to: Problem in Simulation with higher Reynolds number in Cylinder3d #8638atanuchaudhury1994@gmail.comParticipantthank you
atanuchaudhury1994@gmail.comParticipantYes it is same for both the boundary conditions.
April 2, 2024 at 2:02 pm in reply to: Simulation giving out: absoluteErrorL2(line)=0.0981649 and relativeErrorL2(line) #8445atanuchaudhury1994@gmail.comParticipantYes Sir I tried to change the Physical Parameter of the model, from Laminar to Turbulent Form. And so the simulation is showing converged after completing 28% only rather completing 100% as given in the previous reply.
April 2, 2024 at 1:27 pm in reply to: Simulation giving out: absoluteErrorL2(line)=0.0981649 and relativeErrorL2(line) #8443atanuchaudhury1994@gmail.comParticipantI mean by the message that, the Cavity2D example is in Laminar Form and I want to change it in Turbulent Form and so I made some changes in the code:
1st Change:
using T = FLOATING_POINT_TYPE;
using DESCRIPTOR = D2Q9<>;
using BulkDynamics = ConstRhoBGKdynamics<T,DESCRIPTOR>;#define USE_SMAGORINSKY //default
2nd Change:
// Material=1 –>bulk dynamics
//sLattice.defineDynamics<BulkDynamics>(superGeometry, 1);
#ifdef USE_SMAGORINSKY
using BulkDynamics = SmagorinskyBGKdynamics<T,DESCRIPTOR>;
sLattice.defineDynamics<BulkDynamics>(superGeometry, 1);
//sLattice.setParameter<collision::LES::Smagorinsky>(T(0.15));
sLattice.setParameter<collision::LES::Smagorinsky>(0.15);
#endifand so I am an error message:
[ValueTracer] average=0.000966059; stdDev/average=0.00105275
[main] Simulation converged.
[LatticeStatistics] step=133153; t=53.2612; uMax=0.16; avEnergy=0.000968583; avRho=0.988066
[Timer] step=133153; percent=26.6306; passedTime=3119.43; remTime=8594.28; MLUPs=6.68937
We could not find a gnuplot distribution at your system.
We still write the data files s.t. you can plot the data yourself.
We could not find a gnuplot distribution at your system.
We still write the data files s.t. you can plot the data yourself.
[getResults] absoluteErrorL2(line)=0.0278967; relativeErrorL2(line)=0.281255
[Timer]
[Timer] —————-Summary:Timer—————-
[Timer] measured time (rt) : 3120.689s
[Timer] measured time (cpu): 3104.719s
[Timer] average MLUPs : 6.861
[Timer] average MLUPps: 6.861
[Timer] ———————————————So is there any solution for that? Or there is there any other way to change Cavity2D in Turbulent Form. If there please suggest.
April 2, 2024 at 12:23 pm in reply to: Simulation giving out: absoluteErrorL2(line)=0.0981649 and relativeErrorL2(line) #8441atanuchaudhury1994@gmail.comParticipantSo can you suggest what changes I have to make to get the required output. As I tired with different Reynolds number, its giving the same result. Please tell me how to come out of this situation.
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