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https://github.com/PhasicFlow/phasicFlow.git
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308 lines
6.5 KiB
C++
308 lines
6.5 KiB
C++
/*------------------------------- phasicFlow ---------------------------------
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O C enter of
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O O E ngineering and
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O O M ultiscale modeling of
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OOOOOOO F luid flow
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------------------------------------------------------------------------------
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Copyright (C): www.cemf.ir
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email: hamid.r.norouzi AT gmail.com
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------------------------------------------------------------------------------
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Licence:
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This file is part of phasicFlow code. It is a free software for simulating
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granular and multiphase flows. You can redistribute it and/or modify it under
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the terms of GNU General Public License v3 or any other later versions.
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phasicFlow is distributed to help others in their research in the field of
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granular and multiphase flows, but WITHOUT ANY WARRANTY; without even the
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implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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-----------------------------------------------------------------------------*/
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#ifndef __cGNonLinearCF_hpp__
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#define __cGNonLinearCF_hpp__
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#include "types.hpp"
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namespace pFlow::cfModels
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{
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template<bool limited=true>
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class cGNonLinear
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{
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public:
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struct contactForceStorage
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{
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realx3 overlap_t_ = 0.0;
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};
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struct cGNonLinearProperties
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{
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real Yeff_ = 1000000.0;
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real Geff_ = 8000000.0;
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real en_ = 1.0;
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real mu_ = 0.00001;
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INLINE_FUNCTION_HD
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cGNonLinearProperties(){}
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INLINE_FUNCTION_HD
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cGNonLinearProperties(real Yeff, real Geff, real en, real mu ):
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Yeff_(Yeff), Geff_(Geff), en_(en), mu_(mu)
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{}
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INLINE_FUNCTION_HD
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cGNonLinearProperties(const cGNonLinearProperties&)=default;
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INLINE_FUNCTION_HD
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cGNonLinearProperties& operator=(const cGNonLinearProperties&)=default;
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INLINE_FUNCTION_HD
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~cGNonLinearProperties() = default;
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};
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protected:
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using cGNonLinearArrayType = symArray<cGNonLinearProperties>;
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int32 numMaterial_ = 0;
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ViewType1D<real> rho_;
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int32 addDissipationModel_;
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cGNonLinearArrayType nonlinearProperties_;
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bool readNonLinearDictionary(const dictionary& dict)
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{
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auto Yeff = dict.getVal<realVector>("Yeff");
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auto Geff = dict.getVal<realVector>("Geff");
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auto nu = dict.getVal<realVector>("nu");
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auto en = dict.getVal<realVector>("en");
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auto mu = dict.getVal<realVector>("mu");
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auto nElem = Yeff.size();
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if(nElem != nu.size())
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{
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fatalErrorInFunction<<
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"sizes of Yeff("<<nElem<<") and nu("<<nu.size()<<") do not match.\n";
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return false;
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}
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if(nElem != en.size())
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{
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fatalErrorInFunction<<
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"sizes of Yeff("<<nElem<<") and en("<<en.size()<<") do not match.\n";
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return false;
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}
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if(nElem != mu.size())
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{
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fatalErrorInFunction<<
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"sizes of Yeff("<<nElem<<") and mu("<<mu.size()<<") do not match.\n";
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return false;
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}
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// check if size of vector matchs a symetric array
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uint32 nMat;
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if( !cGNonLinearArrayType::getN(nElem, nMat) )
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{
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fatalErrorInFunction<<
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"sizes of properties do not match a symetric array with size ("<<
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numMaterial_<<"x"<<numMaterial_<<").\n";
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return false;
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}
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else if( numMaterial_ != nMat)
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{
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fatalErrorInFunction<<
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"size mismatch for porperties. \n";
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return false;
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}
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Vector<cGNonLinearProperties> prop("prop",nElem);
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ForAll(i,Yeff)
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{
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prop[i] = {Yeff[i], Geff[i], en[i], mu[i]};
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}
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nonlinearProperties_.assign(prop);
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auto adm = dict.getVal<word>("additionalDissipationModel");
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if(adm == "none")
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{
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addDissipationModel_ = 1;
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}
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else if(adm == "LU")
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{
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addDissipationModel_ = 2;
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}
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else if (adm == "GB")
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{
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addDissipationModel_ = 3;
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}
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else
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{
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addDissipationModel_ = 1;
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}
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return true;
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}
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static const char* modelName()
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{
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if constexpr (limited)
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{
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return "cGNonLinearLimited";
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}
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else
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{
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return "cGNonLinearNonLimited";
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}
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return "";
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}
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public:
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TypeInfoNV(modelName());
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INLINE_FUNCTION_HD
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cGNonLinear(){}
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cGNonLinear(
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int32 nMaterial,
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const ViewType1D<real>& rho,
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const dictionary& dict)
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:
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numMaterial_(nMaterial),
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rho_("rho",nMaterial),
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nonlinearProperties_("cGNonLinearProperties",nMaterial)
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{
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Kokkos::deep_copy(rho_,rho);
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if(!readNonLinearDictionary(dict))
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{
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fatalExit;
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}
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}
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INLINE_FUNCTION_HD
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cGNonLinear(const cGNonLinear&) = default;
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INLINE_FUNCTION_HD
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cGNonLinear(cGNonLinear&&) = default;
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INLINE_FUNCTION_HD
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cGNonLinear& operator=(const cGNonLinear&) = default;
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INLINE_FUNCTION_HD
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cGNonLinear& operator=(cGNonLinear&&) = default;
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INLINE_FUNCTION_HD
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~cGNonLinear()=default;
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INLINE_FUNCTION_HD
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int32 numMaterial()const
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{
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return numMaterial_;
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}
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//// - Methods
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INLINE_FUNCTION_HD
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void contactForce
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(
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const real dt,
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const uint32 i,
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const uint32 j,
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const uint32 propId_i,
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const uint32 propId_j,
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const real Ri,
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const real Rj,
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const real cGFi,
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const real cGFj,
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const real ovrlp_n,
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const realx3& Vr,
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const realx3& Nij,
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contactForceStorage& history,
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realx3& FCn,
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realx3& FCt
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)const
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{
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const auto prop = nonlinearProperties_(propId_i,propId_j);
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const real f = 2/( 1/cGFi + 1/cGFj );
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real vrn = dot(Vr, Nij);
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realx3 Vt = Vr - vrn*Nij;
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history.overlap_t_ += Vt*dt;
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real mi = 3*Pi/4*pow(Ri,static_cast<real>(3))*rho_[propId_i];
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real mj = 3*Pi/4*pow(Rj,static_cast<real>(3))*rho_[propId_j];
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real Reff = 1/(1/Ri + 1/Rj);
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real K_hertz = 4.0/3.0*prop.Yeff_*sqrt(Reff);
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real sqrt_meff_K_hertz = sqrt((mi*mj)/(mi+mj) * K_hertz);
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real en = prop.en_;
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if (addDissipationModel_==2)
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{
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en = sqrt(1+((pow(prop.en_,2)-1)*f));
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}
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else if (addDissipationModel_==3)
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{
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en = exp((pow(f,static_cast<real>(1.5))*log(prop.en_)*sqrt( (1-((pow(log(prop.en_),2))/(pow(log(prop.en_),2)+pow(Pi,2))))/(1-(pow(f,3)*(pow(log(prop.en_),2))/(pow(log(prop.en_),2)+pow(Pi,2)))) ) ));
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}
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real Kn = static_cast<real>(4.0/3.0) * prop.Yeff_ * sqrt(Reff*ovrlp_n);
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real ethan_ = -2.0*log(en)*sqrt(Kn)/
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sqrt(pow(log(en),2)+ pow(Pi,2));
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FCn = ( - Kn*ovrlp_n -
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sqrt_meff_K_hertz*ethan_*pow(ovrlp_n,static_cast<real>(0.25))*vrn)*Nij;
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FCt = (f*f)*(- static_cast<real>(8.0) * prop.Geff_ * sqrt(Reff*ovrlp_n) ) * history.overlap_t_;
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real ft = length(FCt);
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real ft_fric = prop.mu_ * length(FCn);
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// apply friction
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if(ft > ft_fric)
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{
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if( length(history.overlap_t_) >0.0)
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{
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if constexpr (limited)
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{
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real kt = static_cast<real>(8.0) * prop.Geff_ * sqrt(Reff*ovrlp_n);
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FCt *= (ft_fric/ft);
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history.overlap_t_ = - FCt/(f*f*kt);
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}
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else
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{
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FCt = (FCt/ft)*ft_fric;
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}
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}
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else
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{
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FCt = 0.0;
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}
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}
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}
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};
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} //pFlow::CFModels
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#endif
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