Lift Force on a particle

[Henderson_C]

Hello OpenLB community and developers,

I would like to ask about the usage of SuperLatticePhysBoundaryForce2D() in the context of resolved particles modeled with HLBM.

My objective is to constrain the particle motion along the y-axis and extract the temporal behavior of the hydrodynamic forces in that direction. When I rely only on ParticleManager functions such as getField, the results tend to fluctuate significantly. To address this, I am considering the use of SuperLatticePhysBoundaryForce2D() to obtain a more stable evaluation of the force (Fy) acting on the particle.

Could you please share your thoughts on whether this is an appropriate approach, or suggest alternative methods for accurately obtaining the y-direction force in this setup?

Thank you in advance for your time and guidance.

Best regards,

[mathias]

Both approaches are very simular and both has been validated. I would rather propose that you find out why your results fluctuate? If Re_p is high, it might be natural..

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