A review of research on laminar mixed convection flow over backward- and forward-facing steps

Abu-Mulaweh, Hosni I.

doi:10.1016/s1290-0729(03)00062-0

Cited by 148 publications

(55 citation statements)

References 15 publications

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“…In a recent study, Bahrami and Gandjalikhan Nassab [12] analyzed the convection flow over forward facing step in a duct to investigate the amount of entropy generation in this type of flow. A review of research on laminar convection flow over backward and forward facing step was done by Abu-Mulaweh [13]. In that study, a comprehensive review of such flows which have been reported in several studies in the open literature was presented.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Combined Radiation and Forced Convection Heat Transfer in 3D Laminar Flow over an Inclined Forward Facing Step

Rayeni¹,

Nassab²

2016

JECTC

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In the current study, a numerical investigation of three-dimensional combined convection-radiation heat transfer over an inclined forward facing step (FFS) in a horizontal rectangular duct is presented. The fluid is treated as a gray, absorbing, emitting and scattering medium. To simulate the incline surface of FFS, the blocked-off method is employed in this study. The set of governing equations for gas flow are solved numerically using the CFD technique to obtain the temperature and velocity fields. Since the gas is considered as a radiating medium, all of the convection, conduction and radiation heat transfer mechanisms are presented in the energy equation. For computation of radiative term in energy equation, the radiative transfer equation (RTE) is solved numerically by the discrete ordinates method (DOM) to find the divergence of radiative heat flux distribution inside the radiating medium. The effects of optical thickness, radiation-conduction parameter and albedo coefficient on heat transfer behavior of the system are carried out.

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Section: Introductionmentioning

confidence: 99%

Analysis of Combined Radiation and Forced Convection Heat Transfer in 3D Laminar Flow over an Inclined Forward Facing Step

Rayeni¹,

Nassab²

2016

JECTC

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“…It is widely known that vortices can appear, although the flow is not turbulent (Tabeling, 2005;Abu-Mulaweh, 2003;Kang et al, 1999). These vortices can appear in laminar flows when there are obstacles or sudden changes in the geometry.…”

Section: Discussionmentioning

confidence: 99%

Investigations into packaging technology for membrane-based thermal flow sensors

Dumstorff

Brauns

Lang

2015

J. Sens. Sens. Syst.

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Abstract.A new packaging method to mount a membrane-based thermal flow sensor, flush with the surface, is presented. Therefore, a specific design for the housing is shown, which is also adaptable to other conditions. It has been experimentally shown that it is important to mount the sensor flush with the surface. In addition, the experimental results are discussed. If a membrane-based thermal flow sensor is not mounted flush with the surface, vortices can occur (depending on velocity and fluid properties) or the reduction in the channel cross section plus a decrease in sensitivity have to be taken into account.

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“…1). A comprehensive summary of experimental and numerical results of this problem can be found in the review article by Abu-Malaweh [14].…”

Section: Test Problem Descriptionmentioning

confidence: 99%

Model reduction in the back step fluid–thermal problem with variable geometry

Baché

Vega

Velázquez

2010

International Journal of Thermal Sciences

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ARTICLE INFO ABSTRACT Keywords:Proper orthogonal decomposition Reduced-order model Variable geometry A methodology is presented to undertake the development of reduced-order models (ROMs) in variable geometry ñuid-thermal problems using the method of snapshots. First, some snapshots are calculated in computational domains that vary in both shape and number of grid points. These snapshots are projected onto a so-called virtual grid (defined in a virtual geometry) using a smooth transformation. Proper orthogonal decomposition (POD) modes are obtained from the associated virtual snapshots and projected back onto the original grids, where they are used to define expansions of the flow variables. The associated POD mode amplitudes are obtained minimizing a residual, which is calculated in terms of the reconstructed solution. POD modes are calculated using only a part of the computational domain, which will be called the projection window, and the residual is defined using only a limited number of points of the computational domain. This methodology is illustrated addressing the problem of heat transfer downstream of a backward facing step in the 2-D steady, laminar regime, with three free parameters, namely the Reynolds number, the wall temperature, and the step height.

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A review of research on laminar mixed convection flow over backward- and forward-facing steps

Cited by 148 publications

References 15 publications

Analysis of Combined Radiation and Forced Convection Heat Transfer in 3D Laminar Flow over an Inclined Forward Facing Step

Analysis of Combined Radiation and Forced Convection Heat Transfer in 3D Laminar Flow over an Inclined Forward Facing Step

Investigations into packaging technology for membrane-based thermal flow sensors

Model reduction in the back step fluid–thermal problem with variable geometry

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