New scalable Direct Simulation Monte Carlo code available for modeling gas flows

Scilight ◽  
2019 ◽  
Vol 2019 (31) ◽  
pp. 310009
Author(s):  
Chris Patrick
Keyword(s):  
Monte Carlo ◽  
Direct Simulation Monte Carlo ◽  
Gas Flows ◽  
Monte Carlo Code ◽  
Direct Simulation ◽  
Simulation Monte Carlo

Development of Object-Oriented Direct Simulation Monte Carlo Code for Modeling of Rarefied Flow around Geometries of Arbitrary Shapes

2011 ◽  
Vol 110-116 ◽  
pp. 2491-2496
Author(s):  
Sourabh Jain ◽  
Prabhu Ramachandran
Keyword(s):  
Monte Carlo ◽  
Heat Conduction Problem ◽  
Direct Simulation Monte Carlo ◽  
Object Oriented ◽  
Navier Stokes ◽  
Monte Carlo Code ◽  
Direct Simulation ◽  
Rarefied Flow ◽  
Simulation Monte Carlo ◽  
Arbitrary Shapes

Rarefied flows cannot be accurately simulated using Navier-Stokes (N-S) equations. The Direct Simulation Monte-Carlo (DSMC) technique is a particle based method for accurate simulation of flows under such conditions. A DSMC code is developed using an object-oriented (OO) approach which can simulate flows around arbitrary shapes. Hence, the flux from such boundaries can be correctly predicted. The object-oriented approach enables for easy modification of the code. For example, it is easy to use different collision models to implement different relaxation algorithm. The code is validated for the one-dimensional Fourier heat conduction problem. Results for the development of a shock due to supersonic flow over a 15 degree wedge are also presented. Inclined boundary of the wedge is correctly captured as the particles interact with the the exact shape of the boundary. Shock angle is found more than expected due to rarefaction effects.

Modelling Rarefied Hypersonic Reactive Flows Using the Direct Simulation Monte Carlo Method

2015 ◽  
Vol 18 (4) ◽  
pp. 1095-1121 ◽  
Author(s):  
Ming-Chung Lo ◽  
Cheng-Chin Su ◽  
Jong-Shinn Wu ◽  
Kun-Chang Tseng
Keyword(s):  
Monte Carlo ◽  
Hypersonic Flow ◽  
Direct Simulation Monte Carlo ◽  
Test Cases ◽  
Monte Carlo Code ◽  
Direct Simulation ◽  
Reactive Flows ◽  
Flow Past ◽  
Flow Past A Cylinder ◽  
Simulation Monte Carlo

AbstractThis paper presents the implementation, validation and application of TCE (total collision energy) model for simulating hypersonic reactive flows in a parallel direct simulation Monte Carlo code, named PDSC++, using an unstructured grid. A series of benchmarking test cases, which include reproduction of theoretical rate constants in a single cell, 2D hypersonic flow past a cylinder and 2D-axisymmetric hypersonic flow past a sphere, were performed to validate the implementation. Finally, detailed aerothermodynamics of the flown reentry Apollo 6 Command Module at 105 km is simulated to demonstrate the powerful capability of the PDSC++in treating realistic hypersonic reactive flow at high altitude.

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