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3D Incompressible Turbulent Flow in a Parallelipipedic Cavity

Binous M. S., Abide S., Zeghmati B., Hedi H.

Machine Dynamics Research

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2016

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Vol. 40, No. 2

5--18

EN

This work investigates the turbulent flow in a ventilated cavity by means of numerical simulations. In particular, simulations are performed using a parallel compact fourth-order spatial discretization and the sub-grid scale (SGS) model Wall Adapting Local Eddy (WALE). Results focuses on the turbulence statistics and are validated against experimental data, for which a good agreement is observed. So, this contribution illustrates how compact schemes can be used to combine high-order accuracy with complex flow.

2

Numerical Simulation of Turbulent Heat Transfer in a Vertical Channel with Discrete Heat Wall

Chesneau X., Zeghmati B., Abide S.

Machine Dynamics Research

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2012

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Vol. 36, No. 1

48-63

EN

Turbulent heat transfer in a vertical channel with discrete heat wall source has been studied numerically. Three different cases were tested according to the heated part of the channel wall. In the first case the flux is applied on the left wall and at the top and the bottom of the right wall separated by an adiabatic zone. The second case, the flux is applied on a zone located on the middle of the left wall and the flux conditions are identical to the first case and in the third case, the right wall is soaked with water. Transfer equations associated to the Launder and Sharma low Reynolds number k-s model are solved using the finite volume method, Thomas and Gauss algorithms. Effects of heat flux density and Reynolds numbers on velocity, air and wall temperature, eddy viscosity, Nusselt and Sherwood numbers were investigated. From these results the driven buoyancy flow for low Reynolds numbers and great Rayleigh numbers affects substantially transfers along the channel. The adiabatic zone influences substantially heat and mass transfer along the channel.

3

A 4th-Order Staggered Compact Finite Difference Method for the Three-Dimensional Incompressible Navier-Stokes Equations

Abide S., Chesneau X., Zeghmati B.

Machine Dynamics Research

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2011

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Vol. 35, No. 1

7-18

EN

The objective of this work is the developement and assessment of a fourth-order compact scheme for the three-dimensional unsteady incompressible viscous flows. The equations of the flow are discretized on a staggered grid and using fourth-order compact scheme for the three directions. The accuracy of the method is demonstrated in the Taylor-Green vortex problem. Finally, the turbulent natural convection in a vertical channel is investigated to validate the numerical methods.