Numerical simulation of wall roughness effects in cavitating flow

Hydrodynamic cavitation has an important effect on the performance of Diesel injectors. It influences the nature of the fuel spray and the efficiency of the combustion process. In the present study, we investigate numerically the effect of wall roughness in the cavitating and turbulent flow developi...

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Bibliographic Details
Published in:The International journal of heat and fluid flow 2011-10, Vol.32 (5), p.1068-1075
Main Authors: Echouchene, F., Belmabrouk, H., Le Penven, L., Buffat, M.
Format: Article
Language:English
Subjects:
Applied sciences
Cavitating flow
Cavitation
Computational fluid dynamics
Diesel injector
Energy
Energy. Thermal use of fuels
Engineering Sciences
Engines and turbines
Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc
Exact sciences and technology
Fluid dynamics
Fluid flow
Fluid mechanics
Fluids mechanics
Fundamental areas of phenomenology (including applications)
Mathematical models
Mechanics
Mixture model
Nonhomogeneous flows
Physics
Roughness
Turbulence
Turbulent flow
Wall roughness
Walls
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Summary:Hydrodynamic cavitation has an important effect on the performance of Diesel injectors. It influences the nature of the fuel spray and the efficiency of the combustion process. In the present study, we investigate numerically the effect of wall roughness in the cavitating and turbulent flow developing inside a Diesel injector. The mixture model based on a single fluid is adopted and the commercial Fluent software is used to solve the transport equations. The discharge coefficient C d is computed for different cavitation numbers and wall roughness heights. Profiles of density mixture, vapor volume fraction, mean velocity and turbulent kinetic energy are reported. The effects of wall roughness and injection pressure are analyzed.
ISSN:0142-727X
1879-2278
DOI:10.1016/j.ijheatfluidflow.2011.05.010