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This module was developed byATA Engineering as anadd-on to the Loci/CHEM computational fluid dynamics (CFD) solver. The modulecan be used to couple Loci/CHEM to the computational structural dynamics (CSD)solver Abaqus. The module uses the Simulia Co-Simulation Engine (CSE) API tomap data between the fluid and solid meshes. The CSE is responsible forsynchronizing the solvers in time and passing data between them through memoryinstead of file I/O. Both mechanical and thermal coupling are supported in timeaccurate, quasi-static, and steady state manners. Mechanical coupling foraeroelastic simulations involves Loci/CHEM importing displacements on theinterface surface from Abaqus. Loci/CHEM will the morph its mesh as a result ofthese displacements, and calculate the aerodynamic forces on the interfacesurface. These forces are exported to Abaqus and applied to the finite elementmodel (FEM). Thermal coupling works in a similar fashion, where Loci/CHEM willimport a temperature on the interface surface and export a heat flux on thatsame surface to Abaqus.

Pressure contours on a complient panel [1].

[1] Blades, E.L., P.N. Shah, M. Nucci, and R.S. Miskovish. Demonstration ofMultiphysics Analysis Tools on Representative Hypersonic Vehicle Structures.54th AIAA Structures, Structural Dynamics, and Materials Conference. April8-11, 2013, Boston, Massachusetts.
[2] Blades, E.L., et al. Towards a Coupled Multiphysics Analysis Capability forHypersonic Vehicle Structures. 52nd AIAA Structures, Structural Dynamics,and Materials Conference. April 4-7, 2011, Denver, Colorado.
[3] Blades, E.L., et al. A Multiphysics Simulation Capability Using theSimulia Co-Simulation Engine. 20th AIAA Computational Fluid DynamicsConference. June 27-30, 2011, Honolulu, Hawaii.

This module depends on both Loci and CHEM being installed. Loci is an opensource framework developed at Mississippi State University (MSU) by Dr. EdLuke. The framework provides a rule-based programming model and can takeadvantage of massively parallel high performance computing systems. CHEM is afull featured open source CFD code with finite-rate chemistry built on the Lociframework. CHEM is export controlled under the International Traffic In ArmsRegulations (ITAR). Both Loci and CHEM can be obtained from theSimSys Software Forum hosted by MSU.

This module also leverages the CSE and is intended for co-simulation with anAbaqus FEM, so licenses for the CSE and Abaqus are required.

The source code for the module is freely available to the US Government underSBIR data rights. For more information and to request a copy please contactmnucci@ata-e.com.