private IVector CalculateRhsImplicit(ILinearSystem linearSystem, bool addRhs) { //TODO: what is the meaning of addRhs? Do we need this when solving dynamic thermal equations? //TODO: stabilizingRhs has not been implemented // result = (capacity/dt^2-diffusionConductivity/dt-massTransportConductivity/dt+stabilizingConductivity)*temperature - (StabilizingRhs - rhs/dt)) // result = -dt(conductuvity*temperature - rhs -dt(stabilizingConductivity*temperature + StabilizingRhs)) double a0 = 1 / Math.Pow(timeStep, 2); double a1 = 1 / (2 * timeStep); double a2 = 1 / timeStep; int id = linearSystem.Subdomain.ID; capacityTimesTemperature[id] = provider.CapacityMatrixVectorProduct(linearSystem.Subdomain, temperature[id]); capacityTimesTemperature[id].ScaleIntoThis(a0); diffusionConductivityTimesTemperature[id] = provider.DiffusionConductivityMatrixVectorProduct(linearSystem.Subdomain, temperature[id]); diffusionConductivityTimesTemperature[id].ScaleIntoThis(a2); massTransportConductivityTimesTemperature[id] = provider.MassTransportConductivityMatrixVectorProduct(linearSystem.Subdomain, temperature[id]); massTransportConductivityTimesTemperature[id].ScaleIntoThis(a2); stabilizingConductivityTimesTemperature[id] = provider.StabilizingConductivityMatrixVectorProduct(linearSystem.Subdomain, temperature[id]); rhs[id].ScaleIntoThis(a2); var rhsResult = capacityTimesTemperature[id].Subtract(diffusionConductivityTimesTemperature[id]); rhsResult.SubtractIntoThis(massTransportConductivityTimesTemperature[id].Subtract(stabilizingConductivityTimesTemperature[id])); rhsResult.SubtractIntoThis(stabilizingRhs[id].Subtract(rhs[id])); return(rhsResult); }
private IVector CalculateRhsImplicit(ILinearSystem linearSystem, bool addRhs) { //TODO: what is the meaning of addRhs? Do we need this when solving dynamic thermal equations? //TODO: stabilizingRhs has not been implemented // result = (capacity/dt^2-diffusionConductivity/dt-massTransportConductivity/dt+stabilizingConductivity)*temperature - (StabilizingRhs - rhs/dt)) // result = -dt(conductuvity*temperature - rhs -dt(stabilizingConductivity*temperature + StabilizingRhs)) int id = linearSystem.Subdomain.ID; double[,] kappa = new double[model.Nodes.Count, model.Nodes.Count]; kappa[0, 0] = 1; kappa[model.Nodes.Count - 1, model.Nodes.Count - 1] = 1; IMatrix penalty = Matrix.CreateFromArray(kappa); double a0 = 1 / Math.Pow(timeStep, 2); double a1 = 1 / (2 * timeStep); double a2 = 1 / timeStep; dummyWeakImpositionTimesTemperature[id] = penalty.Multiply(temperature[id]); dummyWeakImpositionTimesTemperature[id].ScaleIntoThis(a2); capacityTimesTemperature[id] = provider.CapacityMatrixVectorProduct(linearSystem.Subdomain, temperature[id]); capacityTimesTemperature[id].ScaleIntoThis(a0); diffusionConductivityTimesTemperature[id] = provider.DiffusionConductivityMatrixVectorProduct(linearSystem.Subdomain, temperature[id]); diffusionConductivityTimesTemperature[id].ScaleIntoThis(a2); diffusionConductivityTimesTemperature[id].AddIntoThis(dummyWeakImpositionTimesTemperature[id]); massTransportConductivityTimesTemperature[id] = provider.MassTransportConductivityMatrixVectorProduct(linearSystem.Subdomain, temperature[id]); massTransportConductivityTimesTemperature[id].ScaleIntoThis(a2); stabilizingConductivityTimesTemperature[id] = provider.StabilizingConductivityMatrixVectorProduct(linearSystem.Subdomain, temperature[id]); rhs[id].ScaleIntoThis(a2); var rhsResult = capacityTimesTemperature[id].Subtract(diffusionConductivityTimesTemperature[id]); rhsResult.SubtractIntoThis(massTransportConductivityTimesTemperature[id].Subtract(stabilizingConductivityTimesTemperature[id])); rhsResult.SubtractIntoThis(stabilizingRhs[id].Subtract(rhs[id])); return(rhsResult); }