Added regularization term to velocity computation. (2bf2021b) · Commits · Tomáš Jakubec / GTMesh

Unstructured_mesh/multiphaseflow.h

+21 −21

Original line number	Original line	Diff line number	Diff line
	@@ -18,6 +18,21 @@
	#include <valarray>		#include <valarray>
	#include <fstream>		#include <fstream>

			/**
			* @brief reg
			* regularizes number to aviod zero division.
			* Simply adds small non-zero constant (1e-7)
			* @param x
			* number to be regularized
			* @return
			* greatered x
			*/
			static double reg(double x)
			{
			return x + 1.0e-7;
			}


	/**		/**
	* @brief The FlowData struct		* @brief The FlowData struct
	* flow computation data		* flow computation data
	@@ -50,12 +65,12 @@ struct FlowData {
	* velocity of gaseous phase		* velocity of gaseous phase
	*/		*/
	Vector<2, double> getVelocityGas() const {		Vector<2, double> getVelocityGas() const {
	return p_g / rho_g;		return p_g / reg(rho_g * getEps_g());
	}		}


	void setVelocityGas(const Vector<2, double>& u_g){		void setVelocityGas(const Vector<2, double>& u_g){
	p_g = u_g * rho_g;		p_g = u_g * rho_g * getEps_g();
	}		}

	/**		/**
	@@ -77,12 +92,12 @@ struct FlowData {
	* velocity of solid component		* velocity of solid component
	*/		*/
	Vector<2, double> getVelocitySolid() const {		Vector<2, double> getVelocitySolid() const {
	return p_s / rho_s;		return p_s / reg(rho_s * eps_s);
	}		}


	void setVelocitySolid(const Vector<2, double>& u_s){		void setVelocitySolid(const Vector<2, double>& u_s){
	p_s = u_s * rho_s;		p_s = u_s * rho_s * eps_s;
	}		}

	static double rho_s;		static double rho_s;
	@@ -337,16 +352,7 @@ private:

	inline void ComputeFluxSolid_wall(const FlowData& innerCellData, EdgeData& edgeData, const MeshType::Face& fcData);		inline void ComputeFluxSolid_wall(const FlowData& innerCellData, EdgeData& edgeData, const MeshType::Face& fcData);

	/**
	* @brief reg
	* regularizes number to aviod zero division.
	* Simply adds small non-zero constant (1e-7)
	* @param x
	* number to be regularized
	* @return
	* greatered x
	*/
	inline double reg(double x);

	private:		private:

	@@ -915,7 +921,7 @@ inline void MultiphaseFlow::ComputeFluxSolid_wall(const FlowData& innerCellData,
	Vector<ProblemDimension,double> du_s_dn = edgeData.LengthOverDist * (fcData.getCellLeftIndex() < BOUNDARY_INDEX(size_t) ?		Vector<ProblemDimension,double> du_s_dn = edgeData.LengthOverDist * (fcData.getCellLeftIndex() < BOUNDARY_INDEX(size_t) ?
	-1.0 * innerCellData.getVelocitySolid() : innerCellData.getVelocitySolid()); // boundary cond		-1.0 * innerCellData.getVelocitySolid() : innerCellData.getVelocitySolid()); // boundary cond

	Vector<ProblemDimension,double> du_s_dt = Vector<ProblemDimension,double>({0.0, 0.0});		Vector<ProblemDimension,double> du_s_dt = {0.0, 0.0};

	// transform derivatives to standard base		// transform derivatives to standard base
	Vector<ProblemDimension,double> du_s_dx = du_s_dn * (edgeData.n[0]) - (du_s_dt * edgeData.n[1]);		Vector<ProblemDimension,double> du_s_dx = du_s_dn * (edgeData.n[0]) - (du_s_dt * edgeData.n[1]);
	@@ -939,13 +945,7 @@ inline void MultiphaseFlow::ComputeFluxSolid_wall(const FlowData& innerCellData,



	#ifdef ___
	#endif

	inline double MultiphaseFlow::reg(double x)
	{
	return x + 1.0e-7;
	}