A semiempirical model of turbulent stratified flow

Abdibekov, Ualikhan; Dzhaugashtin, K. E.

doi:10.1007/bf01051178

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2015

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“…The purpose of this work is a semiempirical turbulent model that uses minimum number of empirical constants that do not depend on the type of flow [9,10].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Unstable Stratified Turbulent Flow in Open Channels

Zhumagulov

Issakhov

Khikmetov

2015

International Journal of Nonlinear Sciences and Numerical Simulation

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This paper considers the unstable stratified turbulent flow in an open channel. A mathematical model of unstable stratified turbulent flow is introduced, which allows to assess the mean and fluctuation characteristics of the turbulent flow. The numerical algorithm is developed for solving this problem. A numerical method is based on the projection method, which divides the problem into three stages. At the first stage, it is assumed that the transfer of momentum occurs only by convection and diffusion. Intermediate velocity field is solved by fractional steps method. At the second stage, three-dimensional Poisson equation is solved by the Fourier method in combination with tridiagonal matrix method (Thomas algorithm). Finally, at the third stage, it is expected that the transfer is only due to the pressure gradient. The simulation results are in satisfactory agreement with the experimental data.

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“…The purpose of this work is a semiempirical turbulent model that uses minimum number of empirical constants that do not depend on the type of flow [9,10].…”

Section: Introductionmentioning

confidence: 99%