Experimental and numerical study on stagnation point offset of turbulent opposed jets

AbstractIn this article, a numerical study is carried out for the steady two-dimensional flow of an incompressible Maxwell fluid in the region of oblique stagnation point over a stretching sheet. The governing equations are transformed to dimensionless boundary layer equations. After some manipulation a system of ordinary differential equations is obtained, which is solved by using parallel shooting method. A comparison with the previous studies is made to show the accuracy of our results. The effects of involving parameters are discussed in detail and the streamlines are drawn to predict the flow pattern of the fluid. It is observed that increasing velocities ratio parameter (ratio of straining to stretching velocity) helps to decrease the boundary layer thickness. Furthermore, the velocity of fluid increases by increasing the obliqueness parameter.

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CFD simulation of length to diameter ratio effects on the energy separation in a vortex tube

Thermal Science ◽

10.2298/tsci101004008b ◽

2011 ◽

Vol 15 (3) ◽

pp. 833-848 ◽

Cited By ~ 13

Author(s):

Reza Bramo ◽

Nader Pourmahmoud

Keyword(s):

Stagnation Point ◽

Cfd Simulation ◽

Vortex Tube ◽

Numerical Study ◽

Flow Characteristics ◽

Diameter Ratio ◽

Tube Length ◽

Energy Separation ◽

Computational Fluid Dynamics Analysis ◽

Length To Diameter Ratio

The objective of the present computational fluid dynamics analysis is an attempt to investigate the effect of length to diameter ratio on the fluid flow characteristics and energy separation phenomenon inside the Ranque-Hilsch vortex tube. In this numerical study, performance of Ranque-Hilsch vortex tubes (RHVT), with length to diameter ratios (L/D) of 8, 9.3, 10.5, 20.2, 30.7 and 35 with six straight nozzles was investigated. It includes generating better understanding of the effects of the stagnation point location on the performance of RHVT. It was found that the best performance was obtained when the ratio of vortex tube length to the diameter was 9.3 and also fort this case the stagnation point was found to be the farthest from the inlet. The results show that the closer distance to the hot end is produced the larger magnitude of the temperature difference. Computed results show good agreement with published experimental results.

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Numerical study of homogeneous–heterogeneous reactions on stagnation point flow of ferrofluid with non-linear slip condition

Chinese Journal of Chemical Engineering ◽

10.1016/j.cjche.2016.05.019 ◽

2017 ◽

Vol 25 (1) ◽

pp. 11-17 ◽

Cited By ~ 25

Author(s):

Zaheer Abbas ◽

Mariam Sheikh

Keyword(s):

Stagnation Point ◽

Numerical Study ◽

Heterogeneous Reactions ◽

Slip Condition ◽

Stagnation Point Flow ◽

Non Linear

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Oblique stagnation point flow of a non-Newtonian nanofluid over stretching surface with radiation: A numerical study

Thermal Science ◽

10.2298/tsci150411163g ◽

2017 ◽

Vol 21 (5) ◽

pp. 2139-2153 ◽

Cited By ~ 8

Author(s):

Abuzar Ghaffari ◽

Tariq Javed ◽

Fotini Labropulu

Keyword(s):

Heat Transfer ◽

Boundary Layer ◽

Differential Equations ◽

Layer Thickness ◽

Stagnation Point ◽

Boundary Layer Thickness ◽

Numerical Study ◽

Convective Boundary Condition ◽

Stretching Surface ◽

Convective Boundary

In this study, we discussed the enhancement of thermal conductivity of elasticoviscous fluid filled with nanoparticles, due to the implementation of radiation and convective boundary condition. The flow is considered impinging obliquely in the region of oblique stagnation point on the stretching surface. The obtained governing partial differential equations are transformed into a system of ordinary differential equations by employing a suitable transformation. The solution of the resulting equations is computed numerically using Chebyshev spectral newton iterative scheme. An excellent agreement with the results available in literature is obtained and shown through tables. The effects of involving parameters on the fluid flow and heat transfer are observed and shown through graphs. It is importantly noted that the larger values of Biot number imply the enhancement in heat transfer, thermal boundary layer thickness, and concentration boundary layer thickness.

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