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A Loci/CHEM module to implement a reacting wall boundary condition to model carbon oxidation.

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Reacting Wall Module

This module was developed by ATA Engineering as an add-on to the Loci/CHEM computational fluid dynamics (CFD) solver. The module augments the viscousWall boundary condition in Loci/CHEM by implementing a two surface reaction carbon oxidation model. The module follows the process outlined in [1] and [2]. The two oxidation reactions modeled are shown below.

O + C -> CO
O2 + 2C -> 2CO

The module will allow O and O2 to exit the fluid domain through a viscousWall boundary, and allow CO to enter the domain through the same boundary. Currently the boundary remains fixed and is not recessed to account for ablation.

Dependencies

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

Obtaining The Module

The source code for the module is freely available to the US Government under SBIR data rights. For more information and to request a copy please contact [email protected].

References

[1] Driver, D. M., et al. "Understanding High Recession Rates of Carbon Ablators Seen in Shear Tests in an Arc Jet". 48th AIAA Aerospace Sciences Meeting. January 4-7, 2010.

[2] Driver, D. M. and MacLean, M. "Improved Predictions of PICA Recession in Arc Jet Shear Tests". 49th AIAA Aerospace Sciences Meeting. January 4-7, 2011.

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A Loci/CHEM module to implement a reacting wall boundary condition to model carbon oxidation.

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