A short note on the entrainment and exit boundary conditions

Kanna, P. Rajesh; Das, Manab Kumar

doi:10.1002/fld.1095

Cited by 9 publications

(2 citation statements)

References 21 publications

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“…So, the study is mainly considered with the size of the baffles (Sb=0. 25 The values of the parameters are Ra = 10 5 , Re = 300, P2, Sb = 0.50, Pr = 0.71 and the distance between the baffles = 0.25. The above said parameters are fixed unless otherwise specified.…”

Section: Resultsmentioning

confidence: 99%

Numerical Investigation of Open Cavities with Parallel Insulated Baffles

Palaniappan¹,

Muthtamilselvan²,

Al‐Mdallal³

et al. 2020

IJHT

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This research reports the outcome of a numerical investigation of convection in ventilation square cavities contains parallel insulated baffles. The left and right walls of the cavity are kept at the high temperature. Whereas the top, bottom cavity walls, parallel baffles are adiabatic. The opening slots are positioned at the top, bottom corners of the hot vertical walls. The governing Navier-Stokes equations are formulated in the form of vorticity- stream functions. The finite difference method is used to find the values of the primitive variables. The effects of baffles size (Sb − 0.25, 0.50, 0.75), 3 various positions of the parallel baffle, Rayleigh number (103 − 106), Reynolds number (30, 300, 600) are discussed with the flow fields, isotherms, and Nusselt number. It is found that the behavior of ventilation cavities does not only depend on the size of the baffles and its positions. It highly depends on the configuration of the ventilation cavity too. Further, the flow fields are restricted by the largest baffles size of Sb = 0.75.

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Section: Resultsmentioning

confidence: 99%

Numerical Investigation of Open Cavities with Parallel Insulated Baffles

Palaniappan¹,

Muthtamilselvan²,

Al‐Mdallal³

et al. 2020

IJHT

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show abstract

“…An uniform velocity of 1.5 is assumed at the jet inlet. Kind-3 boundary condition given by Kanna and Das [9] was used at the left wall, and for the entrainment boundary at the top. At the outlet streamwise gradients are assumed to be zero.…”

Section: Numerical Proceduresmentioning

confidence: 99%

Numerical Simulation of Two Dimensional Laminar Wall Jet Flow over Solid Obstacle

Prakash¹,

Mayilsamy

Kanna

2014

AMM

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A Computational Fluid Dynamics code was developed to study the flow characteristics of two dimensional laminar incompressible flow. Stream function-vorticity formulation was used for solving two dimensional continuity and momentum equations. The unsteady vorticity transport equation is solved by alternate direction implicit scheme. The stream function equation is solved by the successive over relaxation method. A computational code in c-language was developed to solve the tridiagonal system of algebraic equations. Two dimensional flow through a channel with rectangular block at the bottom wall was considered for the validation. The streamline patterns obtained for different Reynolds number shows good agreement with published results. The code was modified to simulate an incompressible laminar wall jet flow around a solid obstacle. Simulations were carried out for different Reynolds numbers. Contour plots of Stream line, u-velocity and v-velocity were obtained. The variations of flow patterns and the development of vortices were studied and reported.

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Numerical simulation of two‐dimensional laminar slot‐jet impingement flows confined by a parallel wall

Sivasamy¹,

Selladurai²,

Kanna

2007

Numerical Methods in Fluids

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SUMMARYTwo-dimensional laminar incompressible impinging slot-jet is simulated numerically to gain insight into flow characteristics. Computations are done for vertically downward-directed slot-jets impinging on a plate at the bottom and confined by a parallel surface on top. The behaviour of the jet with respect to aspect ratio (AR) and Reynolds number (Re) are described in detail. The computed flow patterns for various AR (2-5) and for a range of jet-exit Reynolds numbers (100-500) are analysed to understand the flow characteristics. The transient development of the flow is also simulated for AR = 4 and Re = 300. It is found that the reattachment length is dependent on both AR and Reynolds number for the range considered. The correlation for reattachment length is suggested. The maximum resultant velocity V rmax and its trajectory is reported. A detailed study of horizontal velocity profile at different downstream locations is reported. It is found that the effect of Reynolds number and AR is significant to the bottom wall vorticity in the impingement and wall jet regions.

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A short note on the entrainment and exit boundary conditions

Cited by 9 publications

References 21 publications

Numerical Investigation of Open Cavities with Parallel Insulated Baffles

Numerical Investigation of Open Cavities with Parallel Insulated Baffles

Numerical Simulation of Two Dimensional Laminar Wall Jet Flow over Solid Obstacle

Numerical simulation of two‐dimensional laminar slot‐jet impingement flows confined by a parallel wall

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