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Title |
Numerical Study of Turbulence Kinetic Energy Budget in Accelerated Channel Flow |
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Author |
Mahmood Pasandideh-fard, Mohammad Naeimirad, Ali Khaleghi |
| Citation |
Vol. 26 No. 6 pp. 123-136 |
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Abstract |
Turbulence kinetic energy consisted of three terms: Production, Diffusion and Dissipation which are always in interaction with each other. In this article the budgets of different terms are considered in turbulent accelerated flows in channels. A specific code is used, in which the turbulence model is employed. The channel has 2 heights respectively. The Reynolds accelerating flow varies from 7000 to 45200. The study occurs under various number of accelerations at various distances from channel wall. It was found that the budget of production and dissipation are higher compared with the other term near wall region and the budget of production and dissipation have similar trends near wall region. Further it was found that accelerated flow makes a lag time in the increase of different terms in the way which it strongly depends on the amount of exerted acceleration and distance from channel wall. |
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Keywords |
Turbulence Kinetic energy; Accelerated Flow; Energy Budget; Channel Flow |
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