Measurements of impinging jet flow and heat transfer on a semi-circular concave surface

Choi, Mansoo; Yoo, Han Seoung; Yang, G.; Lee, Joon Sik; Sohn, Dong Kee

doi:10.1016/s0017-9310(99)00257-4

Cited by 98 publications

(59 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It has been shown that the predicted local Nusselt numbers obtained using the k-ε RNG are in good agreement with the experimental data of [14]. Sharif and Mothe [3] numerically investigated the effect of Reynolds number, surface curvature, and nozzle-to-surface spacing and eventually derived a correlation to estimate the average Nusselt number on concave surfaces.…”

Section: Article In Presssupporting

confidence: 54%

“…The inlet turbulence intensity and hydraulic diameter were set to be 5% and 2B respectively. The thermal boundary condition at the concave surface is a constant heat flux of 5000 W/m 2 in accordance with the experiments [14], while the other walls are insulated. The no-slip condition has been applied on all walls.…”

Section: Boundary Conditionsmentioning

confidence: 70%

“…1 shows a schematic diagram of the geometry and the computational domain used in the present work. According to the geometrical dimensions chosen in the experimental study of Choi et al [14] the width of the inlet nozzle (B) has been considered equal to 5 mm. In addition, the target surface which is subjected to a constant heat flux has been assumed to be semi-circular with a diameter of 150 mm, has negligible thickness, and is stationary.…”

Section: Article In Pressmentioning

confidence: 99%

“…In this configuration, centrifugal and Coriolis forces can induce a striking effect on wall jet development in the circumferential direction. Over the past several decades, extensive studies have also been conducted on heat and mass transfer characteristics of impinging jets on concave surfaces [2,3,14,15]. Choi et al [14] experimentally investigated a single slot-jet impinging on a semi-circular concave surface at different jet-to-target distances and jet Reynolds numbers to evaluate the effect of this impingement jet on the wall jet Nusselt number and hydrodynamic characteristics.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Numerical investigation of semi-confined turbulent slot jet impingement on a concave surface using an Al2O3–water nanofluid

Ahmadi

Moghari

Esmailpour

et al. 2016

Applied Mathematical Modelling

View full text Add to dashboard Cite

a b s t r a c tThis paper presents and discusses results of a computational study of the flow field and heat transfer characteristics for a turbulent slot jet of an Al 2 O 3 -water nanofluid impinging normally on to a semi-circular concave surface. A wide range of various flow and geometrical parameters, including the nanoparticle volume fraction ( ), jet Reynolds number (Re), and jet-to-target distance (h/B) have been considered. The results are presented in terms of the streamline patterns, local and average Nusselt numbers, stagnation Nusselt number, shear stress distribution, and pumping power. The results show a significant improvement of heat transfer rate due to the presence of the nanoparticles in water. Moreover, for ratios of h/B greater than three, the maximum average heat transfer rate from the concave surface occurs at h/B = 5. An increase in the jet Reynolds number and nanoparticle concentration leads to an improved cooling performance of jet impingement on the concave surface. However, the elevated viscosity of the nanofluid has the adverse effect of increasing the pumping power needed per unit of heat transferred.

show abstract

Section: Article In Presssupporting

confidence: 54%

Section: Boundary Conditionsmentioning

confidence: 70%

Section: Article In Pressmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Numerical investigation of semi-confined turbulent slot jet impingement on a concave surface using an Al2O3–water nanofluid

Ahmadi

Moghari

Esmailpour

et al. 2016

Applied Mathematical Modelling

View full text Add to dashboard Cite

show abstract

“…The effects of target surface on jet have been analyzed by means of changing the geometry of the target surface such as flat plate, concave, convex, spherical, cylindrical, etc. [8][9][10] or roughing the surface [11][12][13] in order to enhance the turbulence intensity.…”

Section: List Of Symbols Dfmentioning

confidence: 99%

Design analysis of an experimental jet impingement study by using Taguchi method

Çelik

Turgut

2012

Heat Mass Transfer

View full text Add to dashboard Cite

In current study design analysis of a specified impingement jet application is performed by use of Taguchi method. Some results from a previously done experimental study that includes the impingement of co-axial and single circular jets to the both roughened and smooth heated surfaces are handled. By use of Taguchi method, some results are obtained to show the effect of Reynolds numbers (Re = 20,000 and 40,000)

show abstract

Impinging jet cooling on concave surfaces

2004

View full text Add to dashboard Cite

show abstract

Measurements of impinging jet flow and heat transfer on a semi-circular concave surface

Cited by 98 publications

References 21 publications

Numerical investigation of semi-confined turbulent slot jet impingement on a concave surface using an Al2O3–water nanofluid

Numerical investigation of semi-confined turbulent slot jet impingement on a concave surface using an Al2O3–water nanofluid

Design analysis of an experimental jet impingement study by using Taguchi method

Impinging jet cooling on concave surfaces

Contact Info

Product

Resources

About