Heat transfer past rotationally oscillating circular cylinder heated with time‐periodic pulsating temperature in a uniform flow

Ray, Rajendra K.; Haty, Amarjit; Kumar, Arvind

doi:10.1002/htj.22426

Cited by 2 publications

(1 citation statement)

References 39 publications

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“…This phenomenon is called "backward heat transfer" [45]. A similar phenomenon is reported for heat transfer from a circular cylinder heated at a time-periodic pulsating temperature [46]. The lowest peaks of the local Nusselt number are observed at the top (CD) and bottom (AB) surfaces of the control plate, i.e., these parts of the surface will absorb the highest amount of heat from the fluid.…”

Section: Resultssupporting

confidence: 53%

Impact of a Cold Control Plate on Fluid Flow and Heat Transfer across an Isothermally Heated Rotary Oscillating Circular Cylinder

Haty¹,

Ray²,

Mittal³

2023

Preprint

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The main objective of this paper is to study the effect of a cold, vertical, arcshaped control plate on the flow characteristics and forced convective heat transfer mechanism across a rotary oscillating, isothermally heated circular cylinder. Twodimensional, unsteady, incompressible, laminar, and viscous flow of a Newtonian, constant property fluid is considered across the cylinder. The simulations are performed with an in-house code for various gap ratios between the control plate and the cylinder (0 ≤ d/R 0 ≤ 3), maximum angular velocity (0.5 ≤ α m ≤ 4) and frequency ratio of oscillation ( f / f 0 = 0.5, 3) at Prandtl number 0.7 and Reynolds number 150. Here, d denotes the gap between the surface of the cylinder and the leading surface of the control plate, R 0 denotes the radius of the cylinder, f is the frequency of oscillation and f 0 is the frequency of natural vortex shedding. d/R 0 = 0 corresponds to the no plate case. Heat transfer and vortex shedding phenomena are discussed in relation to one another. A significant increase in heat transmission is observed for all α m with the gap ratio of d/R 0 = 0.5 and f / f 0 = 0.5. The heat absorption on the surface of the control plate decreases to zero with increasing gap ratio when α m = 0.5 and f / f 0 = 0.5 but never becomes zero when α m = 4 and f / f 0 = 3. Additionally, when compared to the no plate case with (α m , f / f 0 ) = (0.5, 0.5), the maximum peak of the drag coefficient is decreased by 9.877% for the gap ratio of d/R 0 = 3. For α m = 4 and f / f 0 = 3, the smallest gap ratio of d/R 0 = 0.

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Section: Resultssupporting

confidence: 53%

Impact of a Cold Control Plate on Fluid Flow and Heat Transfer across an Isothermally Heated Rotary Oscillating Circular Cylinder

Haty¹,

Ray²,

Mittal³

2023

Preprint

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Flow dynamics and heat transfer in the wake of an rotary oscillating circular cylinder with an isothermal control plate

Haty,

Ray,

Mittal

2024

Numerical Heat Transfer, Part A: Applications

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Heat transfer past rotationally oscillating circular cylinder heated with time‐periodic pulsating temperature in a uniform flow

Abstract: The transient forced convection heat transfer from an impulsively started rotationally oscillating circular cylinder, heated with time-periodic pulsating temperature in a two-dimensional uniform, laminar and viscous flow of Newtonian, incompressible, constant

Cited by 2 publications

References 39 publications

Impact of a Cold Control Plate on Fluid Flow and Heat Transfer across an Isothermally Heated Rotary Oscillating Circular Cylinder

Impact of a Cold Control Plate on Fluid Flow and Heat Transfer across an Isothermally Heated Rotary Oscillating Circular Cylinder

Flow dynamics and heat transfer in the wake of an rotary oscillating circular cylinder with an isothermal control plate

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