Numerical study of unsteady fluid flow through a tightly coiled rectangular duct of large aspect ratio

2021 ◽  
Author(s):  
Shamsun Naher Dolon ◽  
Mohammad Sanjeed Hasan ◽  
Ratan Kumar Chanda ◽  
Rabindra Nath Mondal
Keyword(s):  
Fluid Flow ◽  
Aspect Ratio ◽  
Numerical Study ◽  
Large Aspect Ratio ◽  
Rectangular Duct ◽  
Unsteady Fluid Flow ◽  
Flow Through ◽  
Unsteady Fluid

scholarly journals The Effects of Magnetic Field on the Fluid Flow through a Rotating Straight Duct with Large Aspect Ratio

2013 ◽  
Vol 56 ◽  
pp. 239-244 ◽  
Author(s):  
Md. Kamruzzaman ◽  
Mohammad Wahiduzzaman ◽  
Md. Mahmud Alam ◽  
Lyazid Djenidi
Keyword(s):  
Magnetic Field ◽  
Fluid Flow ◽  
Aspect Ratio ◽  
Large Aspect Ratio ◽  
Flow Through ◽  
Straight Duct

Numerical Simulations of Unsteady Fluid Flow and Heat Transfer in a Transonic Turbine Stage

2006 ◽  
Author(s):  
F. Mumic ◽  
B. Sunden
Keyword(s):  
Heat Transfer ◽  
Fluid Flow ◽  
Numerical Study ◽  
Time Discretization ◽  
Implicit Time ◽  
Turbine Stage ◽  
Flow And Heat Transfer ◽  
Unsteady Fluid Flow ◽  
Transonic Turbine ◽  
Unsteady Fluid

In this work, a numerical study has been performed to simulate the unsteady fluid flow and heat transfer in a transonic high-pressure turbine stage. The main objective of this study is to understand the unsteady flow field and heat transfer in a single transonic turbine stage using an unsteady structured Navier-Stokes solver. For the time accurate computation, a fully implicit time discretization, dual-time stepping, is performed. The results of the CFD simulations are compared with experimental heat transfer and aerodynamic results available for the so-called MT1 turbine stage. The predicted heat transfer and static pressure distributions show reasonable agreement with experimental data. In particular, the results show significant fluctuations in heat transfer and pressure at midspan on the rotor blade, and that the rotor has a limited influence on the heat transfer to the NGV at mid span.

scholarly journals Numerical study of Unsteady Fluid Flow and Heat Transfer Through a Rotating Curved Rectangular Channel

2018 ◽  
Vol 37 ◽  
pp. 73-92 ◽  
Author(s):  
Md Zohurul Islam ◽  
Md Arifuzzaman ◽  
Rabindra Nath Mondal
Keyword(s):  
Heat Transfer ◽  
Fluid Flow ◽  
Steady State ◽  
Unsteady Flow ◽  
Numerical Study ◽  
Rectangular Channel ◽  
Chaotic Flow ◽  
Flow And Heat Transfer ◽  
Unsteady Fluid Flow ◽  
Unsteady Fluid

Numerical study of unsteady fluid flow and heat transfer through a rotating curved rectangular channel with aspect ratio 2 and curvature ratio 0.05 has been performed by using a spectral-based numerical method, and covering a wide range of the rotational parameter, the Taylor number Ta, for both the positive and negative rotation of the channel. In this paper, unsteady flow characteristics are investigated under combined action of the centrifugal, Coriolis and buoyancy forces for the Dean number De = 1000. For positive rotation, we investigated unsteady solutions for 0 ≤Ta ≤500, and it is found that the chaotic flow turns into steady-state flow through periodic or multi-periodic flows. For negative rotation, on the other hand, unsteady solutions are investigated for –500 ≤Ta≤0, and it is found that the unsteady flow undergoes through various flow instabilities. Typical contours of secondary flow patterns and temperature profiles are obtained at several values of Ta, and it is found that the unsteady flow consists of asymmetric two- to eightvortex solutions. The present study shows that convective heat transfer is significantly enhanced as the secondary flow becomes stronger and the chaotic flow enhances heat transfer more effectively than the steady-state or periodic solutions.GANIT J. Bangladesh Math. Soc.Vol. 37 (2017) 73-92

Numerical study of the hydraulic tortuosity for fluid flow through elliptical particle packings

2021 ◽  
pp. 117047
Author(s):  
Shuang Song ◽  
Liangwan Rong ◽  
Kejun Dong ◽  
Yansong Shen
Keyword(s):  
Fluid Flow ◽  
Numerical Study ◽  
Flow Through ◽  
Particle Packings
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