Friction in non-Newtonian DualSPHysics

salehmeiabadisalehmeiabadi
in DualSPHysics v4.4

Hello,

How can we apply friction between boundaries and fluid in non-Newtonian DualSPHysics?

Does ViscoBoundFactor works for NN_DSPH?

If it doesn't, Is there any solution to apply friction in NN_DSPH?

Thank you so much for sharing your knowledge.

Comments

  • AlexAlex

    @gfourtakas should know the answer!!!

  • salehmeiabadisalehmeiabadi

    Hello to the DualSPHysics team

    I can see that ViscoBoundFactor is available in Interaction Fluid-Bound function.

    However, I am not sure how ViscoBoundFactor works in non_Newtonian DualSPHysics.

    //-ConsEq;

    // Build strain rate tensor and compute eta_visco //what will happen here for boundary particles?

    InteractionForcesFluid_NN_SPH_Visco_Stress_tensor<ftmode, tvisco>(t.npf, t.npb, Visco

    , t.visco_eta, t.spstau, t.d_tensor, t.auxnn, t.pos, t.code, t.idp);

    //-Compute viscous terms and add them to the acceleration

    InteractionForcesFluid_NN_SPH_ConsEq<tker, ftmode, tvisco, tdensity, shift>(t.npf, t.npb, false, Visco

    , t.divdata, t.dcell, t.visco_eta, t.spstau, t.auxnn, t.pos, t.velrhop, t.code, t.idp, t.ace, t.spsgradvel, t.d_tensor, t.pvf, t.apvf, t.sh_rate, t.viscosity, t.ar); //zxcv

    //-Interaction Fluid-Bound.

    InteractionForcesFluid_NN_SPH_ConsEq<tker, ftmode, tvisco, tdensity, shift>(t.npf, t.npb, true, Visco*ViscoBoundFactor

    , t.divdata, t.dcell, t.visco_eta, t.spstau, t.auxnn, t.pos, t.velrhop, t.code, t.idp, t.ace, t.spsgradvel, t.d_tensor, t.pvf, t.apvf, t.sh_rate, t.viscosity, t.ar); //zxcv

    }

    Please advise me in this regard.

    Thanks

  • AlexAlex

    @gfourtakas can help here

  • LLLLLL

    Hi, salehmeiabadi, I have the same question. Have you found an answer?

  • salehmeiabadisalehmeiabadi

    My understanding is that friction between fluid-boundary particles in non-Newtonian DualSPHysics is as much as friction between fluid-fluid particles.

    I would be appreciated it if someone from non-Newtonian DualSPHysics confirm or reject that.

    Regards,

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