Introduction: A Direct Simulation Monte Carlo (DSMC) solver with a modified collisional routine is used to investigate an argon gas flow through millimeter-scaled thruster nozzle high-density ratios. Method: The limiter scheme, denoted as the constant selection (CSL), limits possible number of selected pairs value in accordance present simulation particles cell. Results: Results CSL scheme are ...

The overall object of this paper is a systematic study of gaseous flows and thermal transport in twodimensional microand nano-channels using direct simulation Monte Carlo (DSMC) method. In the flow study, a validation of DSMC code was conducted by simulating a continuum flow in microchannel and the results show that the discrepancy of friction coefficient from theoretical prediction is well bel...

We present the validation of ADBSat, a novel implementation panel method including fast pseudo-shading algorithm, that can quickly and accurately determine forces torques on satellites in free-molecular flow. Our main is comparing test cases between current de facto standard direct simulation Monte Carlo (DSMC), published literature. ADBSat exhibits significantly shorter runtime than DSMC perfo...

Thermodynamic fluctuations are significant at microscopic scales even when hydrodynamic transport models (i.e., Navier-Stokes equations) are still accurate; a well-known example is Rayleigh scattering, which makes the sky blue. Interesting phenomena also appear in non-equilibrium systems, such as the enhancement of diffusion during mixing due to the correlation of velocity and concentration flu...

The paper studies the fuzzy logic controller for a shape memory alloy (SMA) biomimetic (tentacle type) robotic structure. A tentacle manipulator is a manipulator with a great flexibility, with a distributed mass and torque that can take any arbitrary shape. Considering the influences of the environment temperature, for SMA actuation, a special attention has to be paid to the adaptation of contr...

Dynamic sliding mode control (DSMC) of nonlinear systems using neural networks is proposed. In DSMC the chattering is removed due to the integrator which is placed before the input control signal of the plant. However, in DSMC the augmented system is one dimension bigger than the actual system i.e. the states number of augmented system is more than the actual system and then to control of such ...

Hypersonic chemically reacting flow around a wedge in the near-continuum regime was numerically studied by the DSMC method with the main goal of validation of real gas effect models. The influence of vibration-dissociation coupling on the results of numerical simulations was analyzed. To this end, two models of chemical reactions were used in the computations, the total collisional energy model...

This paper presents a numerical approach to solve the multiple temperature kinetic model (MTKM) proposed in AIAA 2009-672, then shows some applications in microscale gas flow simulations. The numerical results predicted by the MTKM are compared with those from Direct Simulation Monte Carlo (DSMC) method, the Navier-Stokes (NS) equations, and the early three temperature kinetic model (TTKM) prop...