Numerical prediction of flow and heat transfer of power-law fluids in a plane channel with a built-in heated square cylinder

Bouaziz, Mohamed Najib; Kessentini, Sameh; Turki, Saïd

doi:10.1016/j.ijheatmasstransfer.2010.07.014

Cited by 60 publications

(24 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The confined flow of power-law fluids (0.2 < n < 1.8) was simulated here for Re = 1-40 and for the fixed blockage ratio of 25% [31][32][33][34] at the Prandtl number of 50 [4][5][6]. Additionally, the effects of blockage ratios of 16.67%, 25%, and 50% on the engineering output parameters with varying power-law index at the maximum value of Reynolds number investigated here (Re = 40) were reported.…”

Section: Resultsmentioning

confidence: 99%

“…The present work is concerned with the confined flow and heat transfer of power-law fluids around a semi-circular cylinder at low Reynolds numbers (Re) for the Prandtl number (Pr) of 50. The value of the Prandtl number of the order of 50 or so is very frequent in chemical, petroleum and oil related engineering applications and selected based on the widespread literature [4][5][6]. At the outset, it is appropriate to briefly review the relevant studies.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

CFD analysis of power-law fluid flow and heat transfer around a confined semi-circular cylinder

Kumar

Dhiman

Baranyi

2015

International Journal of Heat and Mass Transfer

View full text Add to dashboard Cite

a b s t r a c tA numerical analysis using Ansys Fluent was carried out to investigate the forced convection of powerlaw fluids (power-law index varying from 0.2 to 1.8) around a heated semi-circular cylinder with wall confinement (or blockage ratio) of 25%, Prandtl number of 50, and Reynolds numbers 1-40. Flow and thermal fields were found to be steady for Re up to 40. The shear-thickening behavior was found to have a higher value of drag coefficient, whereas the shear-thinning behavior had a smaller value of drag coefficient when compared with Newtonian fluids in the steady regime. The wake size was found shorter in shear-thickening fluids than Newtonian and shear-thinning fluids. An overall heat transfer rate was calculated and found to increase with the rise in Reynolds number. The average Nusselt numbers were observed higher for shear-thinning fluids than Newtonian and shear-thickening fluids; and the maximum enhancement in the heat transfer was achieved approximately 47% as compared to Newtonian fluids. The present results have also been correlated in terms of wake length, drag coefficient and average Nusselt number expressions for various Reynolds numbers and power-law indices studied. In addition, the effects of blockage ratios ranging from 16.67% to 50% on the engineering output parameters with varying powerlaw index at Re = 40 were reported.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

CFD analysis of power-law fluid flow and heat transfer around a confined semi-circular cylinder

Kumar

Dhiman

Baranyi

2015

International Journal of Heat and Mass Transfer

View full text Add to dashboard Cite

show abstract

“…On the other hand, the analogous literature on the flow of power-law fluids past a cylinder is not only of recent vintage but is also much less extensive. Some numerical results are now available on hydrodynamics (D'Allessio and Pascal, 1996;Whitney and Rodin, 2001;Chhabra et al, 2004;, forced convection heat transfer (Soares et al, 2005;, and mixed convection heat transfer (Srinivas et al, 2009;Soares et al, 2009;Bouaziz et al, 2010). However, most of these studies are restricted to the steady flow regime (Sivakumar et al, 2006), very few studies deal with the flow of power-law fluids past a cylinder (Patnana et al, 2009), and heat transfer (Patnana et al, 2010;Soares et al, 2010), in the laminar vortex shedding regime.…”

Section: Previous Workmentioning

confidence: 99%

Two-dimensional Flow of Power-law Fluids over a Pair of Cylinders in a Side-by-Side Arrangement in the Laminar Regime

Panda

2017

Braz. J. Chem. Eng.

View full text Add to dashboard Cite

-This manuscript presents the effect of Reynolds number (Re) and proximity of the bodies on the hydrodynamics of flow of shear-thinning, Newtonian and shear-thickening fluids over a pair of cylinders kept in side-by-side arrangement. Results obtained from the numerical simulations carried out with a combination of different parameters in the range of 0.2 ≤ power law index (n) ≤ 1.8, 0.1 ≤ Re ≤ 100 and 1.2 ≤ G (gap between the cylinders/diameter) ≤ 4 have been discussed in details. Analysis of the results gives a clear insight into the complex influence of Re on streamline patterns, surface pressure profiles, drag and lift coefficients for various fluids when the gap between two cylinder is changed.

show abstract

“…Consequently, reliable results are now available on drag, lift, Strouhal number and Nusselt number characteristics for a circular cylinder in power-law fluids [39][40][41][42][43][44][45][46][47] which span the laminar vortex shedding regime, albeit the limiting value of the Reynolds number denoting cessation of the laminar vortex shedding regime is not yet known [48]. Similarly, reliable results for a square cylinder (a = 0) are also available over the similar ranges of conditions [49][50][51][52][53][54][55][56][57]. Somewhat less extensive results are available for elliptic and rectangular cylinders [12,13,[58][59][60] and these are limited to the so-called steady flow regime.…”

Section: Previous Literaturementioning

confidence: 99%

Effect of power-law fluid behavior on momentum and heat transfer characteristics of an inclined square cylinder in steady flow regime

Rao

Sasmal

Sahu

et al. 2011

International Journal of Heat and Mass Transfer

View full text Add to dashboard Cite

Numerical prediction of flow and heat transfer of power-law fluids in a plane channel with a built-in heated square cylinder

Cited by 60 publications

References 22 publications

CFD analysis of power-law fluid flow and heat transfer around a confined semi-circular cylinder

CFD analysis of power-law fluid flow and heat transfer around a confined semi-circular cylinder

Two-dimensional Flow of Power-law Fluids over a Pair of Cylinders in a Side-by-Side Arrangement in the Laminar Regime

Effect of power-law fluid behavior on momentum and heat transfer characteristics of an inclined square cylinder in steady flow regime

Contact Info

Product

Resources

About