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The 3D computational domain model of a certain automobile exhaust system cold end was built by software UG, shaped grid by Gambit, numerical simulated by computational fluid dynamics software FLUENT. Analysis of the system's internal flow quality , indicated that the system's back pressure fulfilled the design requirements, the pre-muffler's internal flow field is smooth, but the main muffler's wall...
The high-pressure vortex tube is one of key equipment in the skid-mounted package liquefied CBM. The high pressure gas strong rotating flow in vortex tube is the key issues of energy separation. There are many problems that the current experimental methods for the strong high-pressure in three-dimensional rotating turbulent flow and heat transfer measurements. The flow field and temperature field...
Numerical simulation is performed for the gas-liquid two-phase turbulent flow in fluid coupling by using CFD software with Mixture model, PISO algorithm and Realizable turbulence model. The gas-liquid two-phase flow in fluid coupling is investigated by analyzing the distribution of liquid phase, static pressure and velocity vector. The experimental values are analyzed and compared with the braking...
Radial distributions of turbulent kinetic energy k in the tank with different geometrical jet flows was predicted based on CFD method adopted RNG k - ε turbulent model. Some detailed information about turbulence kinetic energy and pressure was obtained. The results showed that at the plane of z=0, pressure did not change significantly and the value was small. With the increase of the distance x, the...
In this paper, the turbulent flow over a triple forward facing step configuration was investigated numerically. To that end, numerical simulations are performed for 4 Re numbers and 36 different geometries. Turbulence is modeled in all simulations using the Standard k-?? model. The resulting flow field is examined in terms of pressure coefficient, vorticity and turbulent kinetic energy. Furthermore,...
A numeric simulation of gas migration in a fully mechanized coal caving stope based on Lattice Boltzmann Method is put forward. A mining stope includes an inlet air tunnel, a return air tunnel, a working face and a goaf. There are two different states of air movement in a stope: turbulent flow in the inlet air tunnel, the return air tunnel, the working face (the three parts are simplified as working...
In this paper presented pressure drop characteristics in one channel of plate heat exchanger by experimental method. Plate Heat Exchanger (PHE) applied in vacuum evaporator for product fresh water. PHE have become popular in chemical, power, food and refrigeration industries due to the efficient heat transfer performance, extremely compact design and flexibility of extend or modify to suit changed...
A stand-alone visualization application has been developed by a multi-disciplinary, collaborative team with the sole purpose of creating an interactive exploration environment allowing turbulent flow researchers to experiment and validate hypotheses using visualization. This system has specific optimizations made in data management, caching computations, and visualization allowing for the interactive...
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