DNDS::Euler::JacobianValue< nVarsFixed > Class Template Reference

Placeholder container for implicit-solver Jacobian matrix storage. More...

#include <Euler.hpp>

Collaboration diagram for DNDS::Euler::JacobianValue< nVarsFixed >:

Public Types
enum	Type { Diagonal = 0 , DiagonalBlock = 1 , Full = 2 }
	Jacobian storage mode selector. More...

Public Member Functions
void	SetDiagonal (ArrayDOFV< nVarsFixed > &uDof)
	Initialize storage for diagonal (scalar-per-variable) Jacobian mode.
void	SetDiagonalBlock (ArrayDOFV< nVarsFixed > &uDof)
	Initialize storage for block-diagonal (dense block-per-cell) Jacobian mode.
void	SetFull (ArrayDOFV< nVarsFixed > &uDof, Geom::tAdjPair &cell2cell)
	Initialize storage for the full sparse block Jacobian following cell adjacency.
void	InverseDiag ()
	Compute the inverse of the diagonal (or block-diagonal) Jacobian.

Public Attributes
ArrayDOFV< nVarsFixed >	diag
	Diagonal Jacobian values (one vector per cell).
ArrayDOFV< nVarsFixed >	diagInv
	Inverse of diagonal Jacobian values.
ArrayEigenMatrix< nVarsFixed, nVarsFixed >	diagBlock
	Block-diagonal Jacobian (one nVars x nVars matrix per cell).
ArrayEigenMatrix< nVarsFixed, nVarsFixed >	diagBlockInv
	Inverse of block-diagonal Jacobian.
ArrayRECV< nVarsFixed >	offDiagBlock
	Off-diagonal blocks for full Jacobian (sparse, adjacency-based).

Detailed Description

template<int nVarsFixed>
class DNDS::Euler::JacobianValue< nVarsFixed >

Placeholder container for implicit-solver Jacobian matrix storage.

Supports three storage modes for the flux Jacobian \(\partial \mathbf{R}/\partial \mathbf{U}\):

• Diagonal: One scalar per variable per cell (cheapest, first-order implicit).
• DiagonalBlock: One dense (nVars x nVars) block per cell (block-Jacobi preconditioner).
• Full: Sparse block structure following cell-to-cell adjacency (full implicit).

Warning

This class is currently a stub. The Set* and InverseDiag methods contain only allocation placeholders (marked with // todo). Actual Jacobian assembly and inversion are not yet implemented.

Template Parameters

nVarsFixed

Compile-time number of conservative variables, determining the block size for DiagonalBlock and Full modes.

Definition at line 780 of file Euler.hpp.

Member Enumeration Documentation

Type

template<int nVarsFixed>

enum DNDS::Euler::JacobianValue::Type

Jacobian storage mode selector.

Enumerator
Diagonal	One scalar per variable per cell (diagonal approximation).
DiagonalBlock	One (nVars x nVars) dense block per cell.
Full	Sparse block structure following cell adjacency graph.

Definition at line 786 of file Euler.hpp.

Member Function Documentation

InverseDiag()

template<int nVarsFixed>

void DNDS::Euler::JacobianValue< nVarsFixed >::InverseDiag ( )

inline

Compute the inverse of the diagonal (or block-diagonal) Jacobian.

Stores the result in diagInv (Diagonal mode) or diagBlockInv (DiagonalBlock mode) for use as a preconditioner in iterative solvers.

Todo:

Implement actual inversion logic.

Definition at line 840 of file Euler.hpp.

SetDiagonal()

template<int nVarsFixed>

void DNDS::Euler::JacobianValue< nVarsFixed >::SetDiagonal ( ArrayDOFV< nVarsFixed > &  uDof )

inline

Initialize storage for diagonal (scalar-per-variable) Jacobian mode.

Parameters

uDof	Reference DOF array whose distribution layout is used for allocation.

Todo:

Implement actual allocation of diagonal storage.

Definition at line 803 of file Euler.hpp.

SetDiagonalBlock()

template<int nVarsFixed>

void DNDS::Euler::JacobianValue< nVarsFixed >::SetDiagonalBlock ( ArrayDOFV< nVarsFixed > &  uDof )

inline

Initialize storage for block-diagonal (dense block-per-cell) Jacobian mode.

Parameters

uDof	Reference DOF array whose distribution layout is used for allocation.

Todo:

Implement actual allocation of (nVars x nVars) block storage.

Definition at line 814 of file Euler.hpp.

SetFull()

template<int nVarsFixed>

void DNDS::Euler::JacobianValue< nVarsFixed >::SetFull ( ArrayDOFV< nVarsFixed > &  uDof, Geom::tAdjPair &  cell2cell  )

inline

Initialize storage for the full sparse block Jacobian following cell adjacency.

Parameters

uDof	Reference DOF array whose distribution layout is used for allocation.
cell2cell	Cell-to-cell adjacency pair defining the sparsity pattern.

Todo:

Implement actual allocation using the adjacency graph.

Definition at line 826 of file Euler.hpp.

Member Data Documentation

diag

template<int nVarsFixed>

ArrayDOFV<nVarsFixed> DNDS::Euler::JacobianValue< nVarsFixed >::diag

Diagonal Jacobian values (one vector per cell).

Definition at line 792 of file Euler.hpp.

diagBlock

template<int nVarsFixed>

ArrayEigenMatrix<nVarsFixed, nVarsFixed> DNDS::Euler::JacobianValue< nVarsFixed >::diagBlock

Block-diagonal Jacobian (one nVars x nVars matrix per cell).

Definition at line 794 of file Euler.hpp.

diagBlockInv

template<int nVarsFixed>

ArrayEigenMatrix<nVarsFixed, nVarsFixed> DNDS::Euler::JacobianValue< nVarsFixed >::diagBlockInv

Inverse of block-diagonal Jacobian.

Definition at line 795 of file Euler.hpp.

diagInv

template<int nVarsFixed>

ArrayDOFV<nVarsFixed> DNDS::Euler::JacobianValue< nVarsFixed >::diagInv

Inverse of diagonal Jacobian values.

Definition at line 793 of file Euler.hpp.

offDiagBlock

template<int nVarsFixed>

ArrayRECV<nVarsFixed> DNDS::Euler::JacobianValue< nVarsFixed >::offDiagBlock

Off-diagonal blocks for full Jacobian (sparse, adjacency-based).

Definition at line 796 of file Euler.hpp.

---

The documentation for this class was generated from the following file:

• /home/runner/work/DNDSR/DNDSR/src/Euler/Euler.hpp