Numerical Study of Laminar and Turbulent Flow Through a Pipe with Fins Attached

2006 ◽  
Vol 49 (2) ◽  
pp. 195-214 ◽  
Author(s):  
Nuri Yucel ◽  
Nureddin Dinler
Keyword(s):  
Turbulent Flow ◽  
Numerical Study ◽  
Laminar And Turbulent Flow ◽  
Flow Through

Numerical Study of Air Distribution in Combustion Chamber

2016 ◽  
Vol 832 ◽  
pp. 218-223
Author(s):  
Michal Špilaček ◽  
Martin Lisý ◽  
Zdenek Skala
Keyword(s):  
Numerical Model ◽  
Turbulent Flow ◽  
Combustion Chamber ◽  
Numerical Study ◽  
Air Distribution ◽  
Secondary Combustion ◽  
Laminar And Turbulent Flow ◽  
Secondary Air

The main goal of this article is to analyze the distribution of primary and secondary combustion air in a combustion chamber. The fuel for the combustion chamber is biomass and the main characteristics the combustion chamber must meet is to be simple, reliable, cheap and ecological. A brief summary of the importance of primary and secondary air is made and then it is compared with the results from the numerical model. The numerical model is based upon a simplified chamber geometry and the results are computed for laminar and turbulent flow. From the comparison are determined flaws of the design of the combustion chamber and outlined possible solutions for their removal and further direction of the study.

scholarly journals Accessing the Influence of Hess-Murray Law on Suspension Flow through Ramified Structures

2013 ◽  
Vol 334-335 ◽  
pp. 322-328 ◽  
Author(s):  
Ana Serrenho ◽  
Antonio F. Miguel
Keyword(s):  
Fluid Flow ◽  
Turbulent Flow ◽  
Cross Section ◽  
Particle Transport ◽  
Flow Resistance ◽  
Suspension Flow ◽  
Similar Performance ◽  
Particle Penetration ◽  
Laminar And Turbulent Flow ◽  
Flow Through

The present study focuses on fluid flow and particle transport in symmetric T-shaped structures formed by tubes with circular and square cross-section. The performances of optimized structures (i.e., structures designed based on constructal allometric laws for minimum flow resistance) and not optimized structures were studied. Flow resistance and particle penetration efficiency were studied both for laminar and turbulent flow regimes, and for micrometer and submicrometer particles. Optimized structures have been proven to perform better for fluid flow but they have a similar performance for particle transport.

Numerical study of the behaviour of an annular aerosol sampling slot in laminar and turbulent flow

1999 ◽  
Vol 30 ◽  
pp. S899-S900 ◽  
Author(s):  
F. Roger ◽  
J.F. Fabriès ◽  
P. Görner ◽  
R. Wrobel ◽  
A. Renoux
Keyword(s):  
Turbulent Flow ◽  
Numerical Study ◽  
Aerosol Sampling ◽  
Laminar And Turbulent Flow

A Comparison of Predicted and Measured Friction Factors for Turbulent Flow Through Rectangular Ducts

1962 ◽  
Vol 84 (1) ◽  
pp. 82-88 ◽  
Author(s):  
J. P. Hartnett ◽  
J. C. Y. Koh ◽  
S. T. McComas
Keyword(s):  
Friction Coefficient ◽  
Turbulent Flow ◽  
Reynolds Numbers ◽  
Square Duct ◽  
Aspect Ratios ◽  
Friction Factors ◽  
Rectangular Channels ◽  
Laminar And Turbulent Flow ◽  
Flow Through ◽  
Predicted Values

The friction coefficient for both laminar and turbulent flow through rectangular channels was analytically and experimentally studied. The analytic expression for the pressure loss in fully established laminar flow was verified by experiment. In turbulent flow, the method of Deissler and Taylor was used to calculate the friction coefficient. The calculated and measured results were in agreement for ducts having large aspect ratios. At aspect ratios less than 5:1, the predicted values of the friction factors were lower than the experimental data, with a maximum difference of 12 per cent evident for the square duct. It was found that the circular-tube correlation accurately predicts the friction coefficient for flow through rectangular ducts of any aspect ratio for Reynolds numbers between 6 × 103 and 5 × 105. Hydrodynamic entrance-length results are also presented in the laminar and turbulent flow ranges for both a smooth and an abrupt entrance configuration.

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