7.30. Mpmd Coupling

Scope: Aria Region
Summary: Allows specification of a coupling with an external application in MPMD mode

begin Mpmd Coupling Value

   Coupling Type {=} {aero | radiation}

   begin Aero Coupling Value
   end

   begin Radiation Coupling Value
   end

end Mpmd Coupling Value

7.30.1. Line Commands

Coupling Type

Syntax: Coupling Type {=} {aero | radiation}
Summary: Set the MPMD coupling type. Valid values are AERO and RADIATION

Parameter	Value	Default
{=}	{= \| are \| is}	–
Value	{aero \| radiation}	–

7.30.2. Aero Coupling

Scope: Mpmd Coupling
Summary: Allows specification of interface location and properties for coupling with an Aero application.

begin Aero Coupling Value

   Coupling Surfaces {=} Value...

   Implicit Absolute Norm2 Solution Update Tolerance {=} Value

   Max Number Iterations {=} Value

   Patch Reconstruction {=} {gregory | none}

   Receive Field {=} Value [Smooth Smoothing Iterations Iterations]

   Send Field {=} Value

   Time Step Mode {=} {aero_subcycle | implicit | negotiate_minimum | thermal_subcycle}

   Transfer Type {=} {conservative | geometric}

   begin Transfer Value
   end

end Aero Coupling Value

7.30.2.1. Line Commands

Coupling Surfaces

Syntax: Coupling Surfaces {=} Value…
Summary: Select the surfaces that are coupled to the aero code.

Parameter	Value	Default
{=}	{= \| are \| is}	–
Value	string…	–

Implicit Absolute Norm2 Solution Update Tolerance

Syntax: Implicit Absolute Norm2 Solution Update Tolerance {=} Value
Summary: Specify the absolute tolerance for mpmd coupled solution update delta.
Description: Specify the convergence tolerance for iterating the mpmd subdomains in terms of an absolute nodal L2 norm on the solution field delta

Parameter	Value	Default
{=}	{= \| are \| is}	–
Value	real	1.798e+308

Max Number Iterations

Syntax: Max Number Iterations {=} Value
Summary: Specify the maximum number of iterations for mpmd coupled simulations.
Description: Aria will stop iterating and accept the solution after the specified number of iterations

Parameter	Value	Default
{=}	{= \| are \| is}	–
Value	integer	10

Patch Reconstruction

Syntax: Patch Reconstruction {=} {gregory | none}
Summary: Higher-order reconstruction of patch coordinates
Description: Note: this feature is only applicable to sending the coordinate field NONE - Interpolate coordinate field using standard finite element basis functions GREGORY - Use Gregory patch reconstruction to smooth surface; useful when sending mesh is significantly coarser than receiving mesh

Parameter	Value	Default
{=}	{= \| are \| is}	–
Value	{gregory \| none}	–

Receive Field

Syntax: Receive Field {=} Value [Smooth Smoothing Iterations Iterations]
Summary: Name of a field to receive from the aero code with optional smoothing.

Parameter	Value	Default
{=}	{= \| are \| is}	–
Value	string	–
Smoothing Iterations	integer	–

Send Field

Syntax: Send Field {=} Value
Summary: Name of a field to send to the aero code.

Parameter	Value	Default
{=}	{= \| are \| is}	–
Value	string	–

Time Step Mode

Syntax: Time Step Mode {=} {aero_subcycle | implicit | negotiate_minimum | thermal_subcycle}
Summary: Specify the coupled time stepping behavior.
Description: AERO_SUBCYCLE - Aria chooses its time step and the aero code subcycles until that duration is simulated THERMAL_SUBCYCLE - Aero code chooses its time step and Aria subcycles until that duration is simulated NEGOTIATE_MINIMUM - Both codes compute a candidate time step and advance at the lower of the two IMPLICIT - Both codes negotiate a minimum time step and then iterate the individual app subdomains in a given time step until both apps are converged

Parameter	Value	Default
{=}	{= \| are \| is}	–
Value	{aero_subcycle \| implicit \| negotiate_minimum \| thermal_subcycle}	–

Transfer Type

Syntax: Transfer Type {=} {conservative | geometric}
Summary: Geometric or conservative transfers
Description: This features toggles between an interpolated or geometric based transfer and a conservative scheme that relies on a middle mesh GEOMETRIC - Use the standard STK transfer which is based on interpolating elemental quantities to desired locations via finite element basis functions CONSERVATIVE - Construct a middle mesh that is a superset of both transfer meshes in order to facilitate a conservative transfer

Parameter	Value	Default
{=}	{= \| are \| is}	–
Value	{conservative \| geometric}	–

7.30.2.2. Transfer

Scope: Aero Coupling

begin Transfer Value

   Patch Reconstruction {=} {gregory | none}

   Receive Field {=} Value [Smooth Smoothing Iterations Iterations]

   Send Field {=} Value

   Transfer Type {=} {conservative | geometric}

end Transfer Value

7.30.2.2.1. Line Commands

Patch Reconstruction

Syntax: Patch Reconstruction {=} {gregory | none}
Summary: Higher-order reconstruction of patch coordinates
Description: Note: this feature is only applicable to sending the coordinate field NONE - Interpolate coordinate field using standard finite element basis functions GREGORY - Use Gregory patch reconstruction to smooth surface; useful when sending mesh is significantly coarser than receiving mesh

Parameter	Value	Default
{=}	{= \| are \| is}	–
Value	{gregory \| none}	–

Receive Field

Syntax: Receive Field {=} Value [Smooth Smoothing Iterations Iterations]
Summary: Name of a field to receive from the aero code with optional smoothing.

Parameter	Value	Default
{=}	{= \| are \| is}	–
Value	string	–
Smoothing Iterations	integer	–

Send Field

Syntax: Send Field {=} Value
Summary: Name of a field to send to the aero code.

Parameter	Value	Default
{=}	{= \| are \| is}	–
Value	string	–

Transfer Type

Syntax: Transfer Type {=} {conservative | geometric}
Summary: Geometric or conservative transfers
Description: This features toggles between an interpolated or geometric based transfer and a conservative scheme that relies on a middle mesh GEOMETRIC - Use the standard STK transfer which is based on interpolating elemental quantities to desired locations via finite element basis functions CONSERVATIVE - Construct a middle mesh that is a superset of both transfer meshes in order to facilitate a conservative transfer

Parameter	Value	Default
{=}	{= \| are \| is}	–
Value	{conservative \| geometric}	–

7.30.3. Radiation Coupling

Scope: Mpmd Coupling
Summary: Specification of parameters for MPMD radiation

begin Radiation Coupling Value

   Iterations Per Radiation Solve {=} Value

   Time Steps Per Radiation Solve {=} Value

end Radiation Coupling Value

7.30.3.1. Line Commands

Iterations Per Radiation Solve

Syntax: Iterations Per Radiation Solve {=} Value
Summary: Set the number of non-linear iterations between each radiation solve

Parameter	Value	Default
{=}	{= \| are \| is}	–
Value	integer	–

Time Steps Per Radiation Solve

Syntax: Time Steps Per Radiation Solve {=} Value
Summary: Set the number of time steps between each radiation solve

Parameter	Value	Default
{=}	{= \| are \| is}	–
Value	integer	–