年間 8 号発行
ISSN 印刷: 1065-5131
ISSN オンライン: 1563-5074
Indexed in
ON THE SIMULATION OF DIAPHRAGM OSCILLATION AND MODELING METHODS FOR AN IMPINGING SYNTHETIC JET
要約
The current paper focuses on different methods of simulation of an axisymmetric impinging synthetic jet positioned on a constant heat flux disk. This zero-net mass-flux jet provides an unsteady turbulent flow by oscillation of a piston or a membrane. The present results are validated against the existing experimental data, demonstrating that the ν2 − f turbulence model is suitable not only in problems using velocity profiles as the inlet boundary condition, but also in problems with moving boundaries and dynamic mesh methods. It illustrates that in a numerical simulation of an impinging synthetic jet, the finest method to provide the most truthful data is full simulation of the cavity and actuator, including a moving boundary, and employing the ideal gas model. In order to calculate Nusselt numbers or temperature distributions, it is necessary to utilize the moving boundary along with a grid method. This is because assigning a definite amount for the inlet thermal boundary condition in a blowing cycle can result in error in the prediction of heat transfer. On the other hand, in problems that do not include heat transfer or cooling, a velocity inlet boundary and the incompressibility assumption are adequate to indicate the appropriate data of velocity variations.
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Khuntia Aswini Kumar , Patro Pandaba, Ghoshal Sanjoy , THERMAL PERFORMANCE ANALYSIS OF A SYNTHETIC JET ACTUATOR WITH MOVING BOUNDARY CONDITION , Journal of Enhanced Heat Transfer, 29, 5, 2022. Crossref