Consequences of an asymmetrical confinement in the transfer phenomena for a cylinder at low Reynolds numbers

Champmartin, Stéphane; Ambari, Abdelhak

doi:10.1016/j.ces.2008.03.030

Cited by 6 publications

(2 citation statements)

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“…In [15][16][17][18] a heated circular cylinder is symmetrically placed (gap ratio γ = 1) in a channel and forced convection (Richardson number Ri = 0) is assumed. Progress in research on the forced convection can also be found for the asymmetrical placement of a circular cylinder in the confined domain [19][20][21][22][23]. Mettu et al [19] explored flow around and forced convection from a circular cylinder placed asymmetrically in a planar channel for Reynolds number Re ranging from 10 to 500, blockage ratio β from 0.1 to 0.4, gap ratio γ from 0.125 to 1 and Prandtl number Pr = 0.744.…”

Section: Current Status Of Literaturementioning

confidence: 99%

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Cross-buoyancy mixed convection from a heated cylinder placed asymmetrically in a channel

Dhiman

Gupta

Baranyi

2018

International Communications in Heat and Mass Transfer

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Mixed convection heat transfer from a heated circular cylinder asymmetrically placed in a horizontal channel was studied for incompressible Newtonian fluid. A systematic investigation using two-dimensional numerical simulation (Ansys Fluent) was performed for the following control parameters: Reynolds number Re = 50, 100, 150, Richardson number Ri = 0, 1, 2, blockage ratio β = 0.2, 0.3, 0.4, gap ratio γ = 0.25, 0.5, 1 and Prandtl number of air Pr = 0.7. Upon changing these parameters, steady and time periodic regimes were identified. The strongest influence on heat transfer (average Nusselt number) was identified when changing the Reynolds number (a 94% increase between the minimum and maximum Re investigated, with other parameters held constant), followed by Richardson number (+18%) and blockage ratio (+16%); the effect of asymmetric placement (γ) was almost negligible (+1%). The time-mean of the drag coefficient was most influenced by blockage ratio (a 150% increase), followed by Richardson number (+91%), gap ratio (+19%), and Re (+10%).

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Section: Current Status Of Literaturementioning

confidence: 99%

“…Champmartin and Ambari [20] studied the effect of disturbances which break the symmetry of the system on heat transfer. An asymmet rical configuration of a single cylinder moving in a horizontal confined channel with Dirichlet and Neumann boundary conditions was investigated numerically.…”

Section: Current Status Of Literaturementioning

confidence: 99%