Scalar and Parallel Optimized Implementation of the Direct Simulation Monte Carlo Method

Dietrich, Stefan; Boyd, Iain D.

doi:10.1006/jcph.1996.0141

Cited by 272 publications

(153 citation statements)

References 5 publications

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“…The non-uniform inflow conditions for this DSMC simulation are shown in figure 7; dsmcFoam straightforwardly handles non-uniform distributions for the inlet conditions of velocity, temperature and number density. Figure 8 shows the resulting velocity profiles in the boundary layer at x =10 mm; the dsmcFoam solution is compared with the solution using the MONACO DSMC code [20,21] together with the PLIF experimental data [19]. There is reasonable agreement between dsmcFoam and the published data.…”

Section: Benchmark Case C : Non-uniform 2d Hypersonic Flow Over a Flamentioning

confidence: 61%

An open source, parallel DSMC code for rarefied gas flows in arbitrary geometries

Scanlon¹,

Roohi²,

White³

et al. 2010

Computers & Fluids

266

132

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Section: Benchmark Case C : Non-uniform 2d Hypersonic Flow Over a Flamentioning

confidence: 61%

An open source, parallel DSMC code for rarefied gas flows in arbitrary geometries

Scanlon¹,

Roohi²,

White³

et al. 2010

Computers & Fluids

266

132

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“…The Mach 10 Kn = 0.2 cylinder case from [38] is repeated and compared with data from MONACO [19], an established DSMC code. 2.…”

Section: Pdfoam: Verificationmentioning

confidence: 99%

pdFOAM: A PIC-DSMC code for near-Earth plasma-body interactions

et al. 2017

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Understanding the interaction of the near-Earth space environment with orbiting bodies is critical, both from a design and scientific perspective. In Low Earth Orbit (LEO), the interaction between the ionosphere and orbiting objects is well studied from a charging perspective. Not well understood is the effect of the ionosphere on the motion of LEO objects i.e. charged aerodynamics. This paper presents the implementation, validation, and verification of the hybrid electrostatic Particle-in-Cell (PIC) -Direct Simulation Monte Carlo (DSMC) code, pdFOAM, to study both the neutral and charged particle aerodynamics of LEO objects. The 2D aerodynamic interaction of a cylinder with a fixed uniform surface potential of −50 V and mesothermal O + and H + plasmas representative of ionospheric conditions is investigated. New insights into the role of bounded ion jets and their effect on surface forces are presented. O + bounded ion jets are observed to cause a 4.4% increase ion direct Charged Particle Drag (dCPD), while H + ion jets produce a net reduction in H + drag by 23.7% i.e. they cause a thrust force. As a result, we conclude that past work, primarily based on Orbital Motion Limited theory, does not adequately capture the physics of LEO charged aerodynamics. Hence, we recommend a revisit of conclusions regarding the significance of CPD to LEO objects -pdFOAM being an appropriate tool for this purpose.

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“…The inviscid fluxes are calculated using modified Steger-Warming flux-vector splitting 17 and the viscous derivatives are calculated using centered differencing. The particle regions are solved using MONACO, 18 The procedure for imposing boundary conditions on the DSMC domain was depicted earlier in Fig. 1(b).…”

Section: Numerical Modelsmentioning

confidence: 99%

Detailed Analysis of a Hybrid CFD-DSMC Method for Hypersonic Non-Equilibrium Flows

Schwartzentruber

Boyd

2005

38th AIAA Thermophysics Conference

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A hybrid numerical scheme designed for hypersonic non-equilibrium flows is presented which solves the Navier-Stokes equations in regions of near-equilibrium and uses the direct simulation Monte Carlo method where the flow is in non-equilibrium. Detailed analysis of each stage of the hybrid cycle illustrates the difficulty in defining physically correct DSMC boundary conditions in regards to both macroscopic state, and velocity distribution. However, results also show that DSMC boundary conditions have little effect on a previously initialized interior particle domain. A sub-relaxation technique capable of determining macroscopic, hydrodynamic properties in a DSMC simulation is used to determine low-scatter boundary conditions for the NS domain. Particle and continuum domains adapt during the hybrid simulation through application of a continuum breakdown parameter based on the gradient-length Knudsen number. The hybrid code reproduces experimental results and full DSMC simulations in half the time for a large range of 1D shock waves in argon and diatomic nitrogen gas.

show abstract

Scalar and Parallel Optimized Implementation of the Direct Simulation Monte Carlo Method

Cited by 272 publications

References 5 publications

An open source, parallel DSMC code for rarefied gas flows in arbitrary geometries

An open source, parallel DSMC code for rarefied gas flows in arbitrary geometries

pdFOAM: A PIC-DSMC code for near-Earth plasma-body interactions

Detailed Analysis of a Hybrid CFD-DSMC Method for Hypersonic Non-Equilibrium Flows

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