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Nektar::AlternateSkewAdvection Class Reference

#include <AlternateSkewAdvection.h>

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Static Public Member Functions

static SolverUtils::AdvectionSharedPtr create (std::string)
 Creates an instance of this class. More...
 

Static Public Attributes

static std::string className
 Name of class. More...
 
static std::string className2
 

Protected Member Functions

 AlternateSkewAdvection ()
 
virtual ~AlternateSkewAdvection ()
 
virtual void v_InitObject (LibUtilities::SessionReaderSharedPtr pSession, Array< OneD, MultiRegions::ExpListSharedPtr > pFields)
 Initialises the advection object. More...
 
virtual void v_Advect (const int nConvectiveFields, const Array< OneD, MultiRegions::ExpListSharedPtr > &fields, const Array< OneD, Array< OneD, NekDouble > > &advVel, const Array< OneD, Array< OneD, NekDouble > > &inarray, Array< OneD, Array< OneD, NekDouble > > &outarray, const NekDouble &time)
 Advects a vector field. More...
 
- Protected Member Functions inherited from Nektar::SolverUtils::Advection
virtual SOLVER_UTILS_EXPORT void v_SetBaseFlow (const Array< OneD, Array< OneD, NekDouble > > &inarray)
 Overrides the base flow used during linearised advection. More...
 

Private Attributes

int m_advectioncalls
 

Friends

class MemoryManager< AlternateSkewAdvection >
 

Additional Inherited Members

- Public Member Functions inherited from Nektar::SolverUtils::Advection
SOLVER_UTILS_EXPORT void InitObject (LibUtilities::SessionReaderSharedPtr pSession, Array< OneD, MultiRegions::ExpListSharedPtr > pFields)
 Interface function to initialise the advection object. More...
 
SOLVER_UTILS_EXPORT void Advect (const int nConvectiveFields, const Array< OneD, MultiRegions::ExpListSharedPtr > &fields, const Array< OneD, Array< OneD, NekDouble > > &advVel, const Array< OneD, Array< OneD, NekDouble > > &inarray, Array< OneD, Array< OneD, NekDouble > > &outarray, const NekDouble &time)
 Interface function to advect the vector field. More...
 
template<typename FuncPointerT , typename ObjectPointerT >
void SetFluxVector (FuncPointerT func, ObjectPointerT obj)
 Set the flux vector callback function. More...
 
void SetRiemannSolver (RiemannSolverSharedPtr riemann)
 Set a Riemann solver object for this advection object. More...
 
void SetFluxVector (AdvectionFluxVecCB fluxVector)
 Set the flux vector callback function. More...
 
void SetBaseFlow (const Array< OneD, Array< OneD, NekDouble > > &inarray)
 Set the base flow used for linearised advection objects. More...
 
- Protected Attributes inherited from Nektar::SolverUtils::Advection
AdvectionFluxVecCB m_fluxVector
 Callback function to the flux vector (set when advection is in conservative form). More...
 
RiemannSolverSharedPtr m_riemann
 Riemann solver for DG-type schemes. More...
 
int m_spaceDim
 Storage for space dimension. Used for homogeneous extension. More...
 

Detailed Description

Definition at line 44 of file AlternateSkewAdvection.h.

Constructor & Destructor Documentation

Nektar::AlternateSkewAdvection::AlternateSkewAdvection ( )
protected

Constructor. Creates ...

Parameters

Definition at line 51 of file AlternateSkewAdvection.cpp.

52  : Advection()
53 {
54 }
Nektar::AlternateSkewAdvection::~AlternateSkewAdvection ( )
protectedvirtual

Definition at line 56 of file AlternateSkewAdvection.cpp.

57 {
58 }

Member Function Documentation

static SolverUtils::AdvectionSharedPtr Nektar::AlternateSkewAdvection::create ( std::string  )
inlinestatic

Creates an instance of this class.

Definition at line 51 of file AlternateSkewAdvection.h.

References Nektar::MemoryManager< DataType >::AllocateSharedPtr().

52  {
53  return MemoryManager<AlternateSkewAdvection>::AllocateSharedPtr();
54  }
Nektar::MemoryManager::AllocateSharedPtr
static boost::shared_ptr< DataType > AllocateSharedPtr()
Allocate a shared pointer from the memory pool.
Definition: NekMemoryManager.hpp:235
void Nektar::AlternateSkewAdvection::v_Advect ( const int  nConvectiveFields,
const Array< OneD, MultiRegions::ExpListSharedPtr > &  fields,
const Array< OneD, Array< OneD, NekDouble > > &  advVel,
const Array< OneD, Array< OneD, NekDouble > > &  inarray,
Array< OneD, Array< OneD, NekDouble > > &  outarray,
const NekDouble &  time 
)
protectedvirtual

Advects a vector field.

Implements Nektar::SolverUtils::Advection.

Definition at line 66 of file AlternateSkewAdvection.cpp.

References ASSERTL0, Nektar::MultiRegions::DirCartesianMap, m_advectioncalls, Vmath::Smul(), Vmath::Vadd(), Vmath::Vmul(), and Vmath::Vvtvp().

73 {
74  for(int n = 0; n < nConvectiveFields; ++n)
75  {
76  // use dimension of Velocity vector to dictate dimension of operation
77  int ndim = advVel.num_elements();
78 
79  // ToDo: here we should add a check that V has right dimension
80 
81  int nPointsTot = fields[0]->GetNpoints();
82  Array<OneD, NekDouble> gradV0,gradV1,gradV2, tmp, Up;
83 
84  gradV0 = Array<OneD, NekDouble> (nPointsTot);
85  tmp = Array<OneD, NekDouble> (nPointsTot);
86 
87  // Evaluate V\cdot Grad(u)
88  switch(ndim)
89  {
90  case 1:
91  if(m_advectioncalls % 2 == 0)
92  {
93  fields[0]->PhysDeriv(inarray[n],gradV0);
94  Vmath::Vmul(nPointsTot,gradV0,1,advVel[0],1,outarray[n],1);
95  }
96  else
97  {
98  Vmath::Vmul(nPointsTot,inarray[n],1,advVel[0],1,gradV0,1);
99  fields[0]->PhysDeriv(gradV0,outarray[n]);
100  }
101  Vmath::Smul(nPointsTot,0.5,outarray[n],1,outarray[n],1); //must be mult by 0.5????
102  break;
103  case 2:
104  gradV1 = Array<OneD, NekDouble> (nPointsTot);
105  if(m_advectioncalls % 2 == 0)
106  {
107  fields[0]->PhysDeriv(inarray[n],gradV0,gradV1);
108  Vmath::Vmul (nPointsTot,gradV0,1,advVel[0],1,outarray[n],1);
109  Vmath::Vvtvp(nPointsTot,gradV1,1,advVel[1],1,outarray[n],1,outarray[n],1);
110  }
111  else
112  {
113  Vmath::Vmul(nPointsTot,inarray[n],1,advVel[0],1,gradV0,1);
114  Vmath::Vmul(nPointsTot,inarray[n],1,advVel[1],1,gradV1,1);
115  fields[0]->PhysDeriv(MultiRegions::DirCartesianMap[0],gradV0,outarray[n]);
116  fields[0]->PhysDeriv(MultiRegions::DirCartesianMap[1],gradV1,tmp);
117  Vmath::Vadd(nPointsTot,tmp,1,outarray[n],1,outarray[n],1);
118  }
119  Vmath::Smul(nPointsTot,1.0,outarray[n],1,outarray[n],1); //must be mult by 0.5????
120  break;
121  case 3:
122  gradV1 = Array<OneD, NekDouble> (nPointsTot);
123  gradV2 = Array<OneD, NekDouble> (nPointsTot);
124 
125  //outarray[n] = 1/2(u*du/dx + v*du/dy + w*du/dz + duu/dx + duv/dy + duw/dz)
126 
127  if(fields[0]->GetWaveSpace() == true)
128  {
129  if(m_advectioncalls % 2 == 0)
130  {
131  //vector reused to avoid even more memory requirements
132  //names may be misleading
133  fields[0]->PhysDeriv(inarray[n],gradV0,gradV1,gradV2);
134  fields[0]->HomogeneousBwdTrans(gradV0,tmp);
135  Vmath::Vmul(nPointsTot,tmp,1,advVel[0],1,outarray[n],1); // + u*du/dx
136  fields[0]->HomogeneousBwdTrans(gradV1,tmp);
137  Vmath::Vvtvp(nPointsTot,tmp,1,advVel[1],1,outarray[n],1,outarray[n],1);// + v*du/dy
138  fields[0]->HomogeneousBwdTrans(gradV2,tmp);
139  Vmath::Vvtvp(nPointsTot,tmp,1,advVel[2],1,outarray[n],1,outarray[n],1);// + w*du/dz
140  }
141  else
142  {
143  Up = Array<OneD, NekDouble> (nPointsTot);
144  fields[0]->HomogeneousBwdTrans(inarray[n],Up);
145  Vmath::Vmul(nPointsTot,Up,1,advVel[0],1,gradV0,1);
146  Vmath::Vmul(nPointsTot,Up,1,advVel[1],1,gradV1,1);
147  Vmath::Vmul(nPointsTot,Up,1,advVel[2],1,gradV2,1);
148 
149  fields[0]->SetWaveSpace(false);
150  fields[0]->PhysDeriv(MultiRegions::DirCartesianMap[0],gradV0,outarray[n]);//duu/dx
151  fields[0]->PhysDeriv(MultiRegions::DirCartesianMap[1],gradV1,tmp);//duv/dy
152  Vmath::Vadd(nPointsTot,tmp,1,outarray[n],1,outarray[n],1);
153  fields[0]->PhysDeriv(MultiRegions::DirCartesianMap[2],gradV2,tmp);//duw/dz
154  Vmath::Vadd(nPointsTot,tmp,1,outarray[n],1,outarray[n],1);
155  fields[0]->SetWaveSpace(true);
156  }
157 
158  Vmath::Smul(nPointsTot,1.0,outarray[n],1,tmp,1); //must be mult by 0.5????
159  fields[0]->HomogeneousFwdTrans(tmp,outarray[n]);
160  }
161  else
162  {
163  if(m_advectioncalls % 2 == 0)
164  {
165  fields[0]->PhysDeriv(inarray[n],gradV0,gradV1,gradV2);
166  Vmath::Vmul(nPointsTot,gradV0,1,advVel[0],1,outarray[n],1);
167  Vmath::Vvtvp(nPointsTot,gradV1,1,advVel[1],1,outarray[n],1,outarray[n],1);
168  Vmath::Vvtvp(nPointsTot,gradV2,1,advVel[2],1,outarray[n],1,outarray[n],1);
169  }
170  else
171  {
172  Vmath::Vmul(nPointsTot,inarray[n],1,advVel[0],1,gradV0,1);
173  Vmath::Vmul(nPointsTot,inarray[n],1,advVel[1],1,gradV1,1);
174  Vmath::Vmul(nPointsTot,inarray[n],1,advVel[2],1,gradV2,1);
175  fields[0]->PhysDeriv(MultiRegions::DirCartesianMap[0],gradV0,outarray[n]);
176  fields[0]->PhysDeriv(MultiRegions::DirCartesianMap[1],gradV1,tmp);
177  Vmath::Vadd(nPointsTot,tmp,1,outarray[n],1,outarray[n],1);
178  fields[0]->PhysDeriv(MultiRegions::DirCartesianMap[2],gradV2,tmp);
179  Vmath::Vadd(nPointsTot,tmp,1,outarray[n],1,outarray[n],1);
180  }
181  Vmath::Smul(nPointsTot,1.0,outarray[n],1,outarray[n],1); //must be mult by 0.5????
182  }
183  break;
184  default:
185  ASSERTL0(false,"dimension unknown");
186  }
187  }
188 }
ASSERTL0
#define ASSERTL0(condition, msg)
Definition: ErrorUtil.hpp:161
Vmath::Vvtvp
void Vvtvp(int n, const T *w, const int incw, const T *x, const int incx, const T *y, const int incy, T *z, const int incz)
vvtvp (vector times vector plus vector): z = w*x + y
Definition: Vmath.cpp:428
Vmath::Smul
void Smul(int n, const T alpha, const T *x, const int incx, T *y, const int incy)
Scalar multiply y = alpha*y.
Definition: Vmath.cpp:199
Nektar::MultiRegions::DirCartesianMap
MultiRegions::Direction const DirCartesianMap[]
Definition: ExpList.h:86
Vmath::Vadd
void Vadd(int n, const T *x, const int incx, const T *y, const int incy, T *z, const int incz)
Add vector z = x+y.
Definition: Vmath.cpp:285
Vmath::Vmul
void Vmul(int n, const T *x, const int incx, const T *y, const int incy, T *z, const int incz)
Multiply vector z = x*y.
Definition: Vmath.cpp:169
void Nektar::AlternateSkewAdvection::v_InitObject ( LibUtilities::SessionReaderSharedPtr  pSession,
Array< OneD, MultiRegions::ExpListSharedPtr >  pFields 
)
protectedvirtual

Initialises the advection object.

This function should be overridden in derived classes to initialise the specific advection data members. However, this base class function should be called as the first statement of the overridden function to ensure the base class is correctly initialised in order.

Parameters
pSessionSession information.
pFieldsExpansion lists for scalar fields.

Reimplemented from Nektar::SolverUtils::Advection.

Definition at line 60 of file AlternateSkewAdvection.cpp.

63 {
64 }

Friends And Related Function Documentation

friend class MemoryManager< AlternateSkewAdvection >
friend

Definition at line 48 of file AlternateSkewAdvection.h.

Member Data Documentation

string Nektar::AlternateSkewAdvection::className
static
Initial value:
=
SolverUtils::GetAdvectionFactory().RegisterCreatorFunction(
"AlternateSkew", AlternateSkewAdvection::create)

Name of class.

Definition at line 56 of file AlternateSkewAdvection.h.

std::string Nektar::AlternateSkewAdvection::className2
static

Definition at line 57 of file AlternateSkewAdvection.h.

int Nektar::AlternateSkewAdvection::m_advectioncalls
private

Definition at line 78 of file AlternateSkewAdvection.h.

Referenced by v_Advect().

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