☰
1) Adiabatic heat bath
Zero-dimensional | Thermal non-equilibrium | Chemistry-vibration coupling
Working directory located here.
See Section 3.4. Relaxation of a Chemically-Reacting Mixture in
V. Casseau, R. C. Palharini, T. J. Scanlon, and R. E. Brown, "A Two-Temperature Open-Source CFD Model for Hypersonic Reacting Flows, Part One: Zero-Dimensional Analysis," Aerospace, vol. 3, no. 4, p. 34, 2016 [Full HTML→]
2) Sod’s shock tube
One-dimensional | AUSM+-up flux scheme
Working directory located here
3) Blunted cone
Axially-symmetric mesh | Thermal non-equilibrium | Slip boundary conditions
Working directory located here
See Section 3.1. Mach 11.3 Blunted Cone in
V. Casseau, D. E.R. Espinoza, T. J. Scanlon, and R. E. Brown, "A Two-Temperature Open-Source CFD Model for Hypersonic Reacting Flows, Part Two: Multi-Dimensional Analysis," Aerospace, vol. 3, no. 4, p. 45, 2016 [Full HTML→]
4) RAM C-II spacecraft
Axially-symmetric mesh | Weakly-ionised flow
Will soon be available
See Section 5.3. RAM-C Spacecraft in
G. Yang, "Finite Element Simulation of Weakly Ionized Hypersonic Flows," Master's thesis, McGill University, Montreal (Canada), 2022
[PDF→]
5) NASA MSL forebody
Hypervelocity flow | MHD flow control
Working directory located here
6) Running your own case
When simulating the complex physics around a re-entry body, it is often necessary to break down the full problem into a sequence of stages and gradually build the case up in complexity. Indeed, convergence can become difficult because of the presence of steep gradients, flow chemistry, thermal non-equilibrium effects, etc, and different strategies must then be adopted to get the desired simulation setup to run.
Some of these strategies are listed hereafter:
1- different levels of mesh refinement as the simulation progresses;
2- non-reacting vs. reacting;
3- continuum vs. rarefied boundary conditions;
4- bounding the temperature field;
5- Mach ramp at the inlet;
6- inviscid vs. viscous flow;
7- no diffusion vs. species diffusion;
8- use of the continuum solver hyFoam vs. thermal non-equilibrium solver hy2Foam;
9- progressive increase in the degree of rarefaction;
10- gradual increase in the maximum CFL number.