Computer Simulation Of Flow Field Research Articles

Researches on Modeling and Simulation of Continuous Wave Mud Pulser

Computer simulation of flow fields about “mud pulser” used in Drilling are studied using a dynamic formulation that models the effects of key design variables on rotor torque. Well known field problems are reviewed and aerodynamically based solutions are explained in detail. The solution of problem is studied numerically and the computer model show replicate the main physical features. The simulation focuses on techniques that ensure fast stable rotary movements for supporting fast transmissions of future drilling and logging working.

Computer simulation of flow fields for quenching medium

Using finite element method (FEM), the complex flow fields of quenching medium in a quenching tank are calculated for the cases with and without a workpiece in it. The influence of the flow homogenization device on the flow fields is studied. The computer simulation results are in consistency with the actual measurement results. According to the simulated results, the structure of the quenching tank and the flow homogenization device are optimized and more uniform flow fields are obtained.

Computer simulation of flow fields for quenching medium

Computer simulation of flow fields for quenching medium

Constant reverse thrust activated reorientation of liquid hydrogen with Geyser initiation

A key objective of the cryogenic fluid management of the spacecraft propulsion system is to develop the technology necessary for acquisition or positioning of liquid outflow or vapor venting. Numerical simulation of positive liquid acquisition is attempted by introducing reverse gravity acceleration, resulting from the propulsive thrust of auxiliary engines, which exceeds critical value for the initiation of geyser. Based on the computer simulation of flowfields during the course of fluid reorientation, six dimensionless parameters resulted in this study. It shows that these parameters hold near-constant values through the entire ranges of liquid filled levels, from 30-80 percent, during the course of fluid reorientation.

Cryogenic hydrogen reorientation and geyser initiation at various liquid-filled levels in microgravity

Resettlement or reorientation of liquid propellant can be accomplished by providing optimal acceleration to the spacecraft such that the propellant is reoriented over the tank outlet without any vapor entrainment, any excessive geysering, or any other undesirable fluid motion for the space fluid management under microgravity environment. Based on the computer simulation of flow fields during the course of fluid reorientation, six dimensionless parameters are resulted in this study.