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Validation 2 - CFD Analysis Process
• FLUENT 6.3 or later
• Density-based explicit double-precision solver
• Inviscid flow
• Species transport of two non-reacting ideal
gases (propellant and air)
• 1 st -order upwind scheme
• Standard upwind flux-difference splitting of
Roe to evaluate fluxes
• Green-Gauss node-based gradient evaluation
• Explicit time stepping approach
• time step determined by the CFL condition
• 4-stage Runge-Kutta scheme with standard
coefficients for time integration
• Mesh adaption based on the BWIP function
• Outflow boundary is a pressure outlet
• Computations are completed before
propagating shocks reach outflow boundaries
12
120 mm ATD firing
FLUENT simulation