Hybrid forced-buoyancy convection in a channel with a backward facing step

Inam, Saad; Lappa, Marcello

doi:10.1016/j.ijheatmasstransfer.2022.122963

Cited by 10 publications

(3 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Reynolds number, step geometry, and fluid properties become parameters in determining fluid flow characteristics through the BFS. The fluid flow characteristics formed are based on the basic theory of the shear layer, which undergoes separation due to a staircase-shaped obstruction [10]. Generally, the BFS flow field can be divided into four regions: the separated shear layer, the recirculation region, the reattachment region, and the attached/recovery region [11].…”

Section: Backward-facing Stepmentioning

confidence: 99%

“…After that, determining the order value of the mesh can be obtained through Equation ( 8) as the second step. In the third step, the error value in the predetermined mesh can be obtained by calculating the Grid Convergence Index (GCI), which is divided into two parts in Equations ( 9) and (10). GCIfine is the error value between fine mesh and medium mesh.…”

Section: Mesh Independence Testmentioning

confidence: 99%

See 1 more Smart Citation

The Influence of Fillet Step on Backward-Facing Step Flow Characteristics

Julian,

Anggara,

Wahyuni

2023

infotekmesin

View full text Add to dashboard Cite

Backward-facing step (BFS) is a model that provides several applicative features in engineering. The complex phenomena of BFS flow have a crucial impact on any application. Therefore, this study comprehensively investigates the flow characteristics of BFS with various step shapes. The backward-facing step (F-BFS) fillets were tested at intervals of Reynolds number 50 smaller than Re smaller than 400 using the CFD approach. Based on the computational results, it was found that flow separation is a fundamental phenomenon in BFS flow. Due to sudden expansion, Flow separation forms a recirculation area which continues to increase almost linearly with an increase in the Reynolds number. The recirculation area contains unstable rotating vortexes, which can impact the flow efficiency of BFS. Using a different step shape proves that F-BFS can minimize the recirculation area to increase the efficiency of the BFS flow.

show abstract

Section: Backward-facing Stepmentioning

confidence: 99%

Section: Mesh Independence Testmentioning

confidence: 99%

The Influence of Fillet Step on Backward-Facing Step Flow Characteristics

Julian,

Anggara,

Wahyuni

2023

infotekmesin

View full text Add to dashboard Cite

show abstract

“…Chen et al (2006) described about experimental results obtained for discretely heated steel plate comprising nine horizontal heat stripes for the case of free convection mode of heat transfer with internal conduction. Unsteady mixed forced-buoyancy convection through channel with a forward facing step by addressing the mirror in a duct undergoing sudden expansion was presented by Inam and Lappa (2022). Fluid flow and heat transfer characteristics in infrared suppression (IRS) device, which is complex nature of the flow features, were discussed by Mukharjee et al (2021).…”

Section: Introductionmentioning

confidence: 99%

Numerical studies on conjugate convection from discretely heated electronic board

Battula

Daravath

Gampa

2022

WJE

View full text Add to dashboard Cite

Purpose This paper deals with numerical studies into combined conduction, convection and radiation from a heated vertical electronic board are provided here. Design/methodology/approach Here three inbuilt heaters with decrease in their heights were placed in the vertical electronic board. With respect to the non-heat portions, two configurations were studied. The first considers the non-heat portions to be adiabatic, while in the second, they are non-adiabatic. The heat that is produced in three heaters is conducted along the board and is dissipated either from the heater portions alone or from the whole board by convection and radiation. Air is considered as working medium, while the equations of heat transfer and flow of fluid are handled without boundary layer approximations. These equations were further solved using finite volume method with Gauss–Seidel iteration method. Findings Results of various comparative studies were discussed to bring out the relevance of thermal conductivity, modified Richardson number and surface emissivity on different heat transfer and flow results concerning this problem. Originality/value The optimum values of surface emissivity, thermal conductivity and modified Richardson number have also been notionally explored.

show abstract