20817 Pressure Loss and Velocity Fluctuation of Dividing Flow through T-Junction of Rectangular Cross-Section

2013 ◽  
Vol 2013.19 (0) ◽  
pp. 429-430
Author(s):  
Takayuki KANEKO ◽  
Masatoshi SANO
Keyword(s):  
Cross Section ◽  
Velocity Fluctuation ◽  
Pressure Loss ◽  
Rectangular Cross Section ◽  
Flow Through

scholarly journals Flow through a helical pipe with rectangular cross-section

1970 ◽  
Vol 4 (2) ◽  
pp. 99-110
Author(s):  
Md Mahmud Alam ◽  
Delowara Begum ◽  
K Yamamoto
Keyword(s):  
Aspect Ratio ◽  
Iterative Method ◽  
Cross Section ◽  
Rectangular Cross Section ◽  
Main Tool ◽  
Numerical Approach ◽  
Dean Number ◽  
Helical Pipe ◽  
Flow Through ◽  
Marine Engineering

The effects of torsion, aspect ratio and curvature on the flow in a helical pipe of rectangular cross- section are studied by introducing a non-orthogonal helical coordinate system. Spectral method is applied as main tool for numerical approach where Chebyshev polynomial is used. The numerical calculations are obtained by the iterative method. The calculations are carried out for 0≤ δ ≤0.02, 1≤ λ ≤ 2.85, 1≤ γ ≤2.4, at Dn = 50 & 100 respectively, where d is the non-dimensional curvature, l the torsion parameter, g the aspect ratio and  Dn the pressure driven parameter (Dean number).DOI: http://dx.doi.org/10.3329/jname.v4i2.991 Journal of Naval Architecture and Marine Engineering Vol.4(2) 2007 p.99-110

Influence of the 180° Bend Geometry on the Pressure Loss and Heat Transfer in a High Aspect Ratio Rectangular Smooth Channel

2004 ◽  
Author(s):  
Detlef Pape ◽  
Herve´ Jeanmart ◽  
Jens von Wolfersdorf ◽  
Bernhard Weigand
Keyword(s):  
Heat Transfer ◽  
Reynolds Number ◽  
Aspect Ratio ◽  
Cross Section ◽  
High Aspect Ratio ◽  
Pressure Loss ◽  
Rectangular Cross Section ◽  
Flow Structures ◽  
Cooling Channel ◽  
Smooth Channel

An experimental and numerical investigation of the pressure loss and the heat transfer in the bend region of a smooth two-pass cooling channel with a 180°-turn has been performed. The channels have a rectangular cross-section with a high aspect ratio of H/W = 4. The heat transfer has been measured using the transient liquid crystal method. For the investigations the Reynolds-number as well as the distance between the tip and the divider wall (tip distance) are varied. While the Reynolds number varies from 50’000 to 200’000 and its influence on the normalized pressure loss and heat transfer is found to be small, the variations of the tip distance from 0.5 up to 3.65 W produce quite different flow structures in the bend. The pressure loss over the bend thus shows a strong dependency on these variations.

scholarly journals INFLUENCE OF SKIN EFFECT ON THE CALCULATION OF BUSBAR SYSTEMS HAVING RECTANGULAR CROSS SECTION

2021 ◽  
Vol 20 (1) ◽  
pp. 057
Author(s):  
Nebojša Raičević ◽  
Ana Vučković ◽  
Mirjana Perić ◽  
Slavoljub Aleksić
Keyword(s):  
Electromagnetic Field ◽  
Cross Section ◽  
Current Density ◽  
Proximity Effect ◽  
Skin Effect ◽  
Rectangular Cross Section ◽  
Error Function ◽  
Current Density Distribution ◽  
Accurate Solution ◽  
Flow Through

One method for the calculation of current density distribution in a finite number of long parallel conductors, having rectangular cross section, is proposed in this paper. Numerical results aim to highlight the importance of the skin effect, which can be combined with the proximity effect. The method of superposition of these two effects was applied to the calculation of the electromagnetic field in electric power busbars systems. It has been shown that the skin effect has a much greater impact, especially when the conductors are thin and strong electric currents flow through them, so special attention is paid to its calculation. For numerical solution the integral equations are used. The function of current density is approximated by the finite functional series. This way leads to a very accurate solution with only two terms. Differential evolution method is applied for minimization of error function. To demonstrate the application of the proposed approach, numerical values for busbars are presented and compared with values obtained by using the finite elements method.

Experimental Characterization of Pressure Loss Caused by Flow Through Foldcore Sandwich Structures

2017 ◽  
Author(s):  
Yves Klett ◽  
Carla Zeger ◽  
Peter Middendorf
Keyword(s):  
Cross Section ◽  
Pressure Loss ◽  
Fluid Transport ◽  
Mechanical Performance ◽  
Experimental Characterization ◽  
Large Cross Section ◽  
Flow Through ◽  
Folded Structures ◽  
Sandwich Core

Folded structures based on different tessellation types have been investigated as alternatives to conventional sandwich core materials like honeycombs and foams. Besides the mechanical performance offered by such foldcores, they feature some unique properties that can be used to integrate additional functionalities. One of these is the possibility to generate large cross-section channels within the sandwich core that can be used for gas and fluid transport. In this study, we present an experimental setup to measure pressure loss within foldcore sandwich panels, and compare results for seven different foldcore configurations.

Pressure Drop in Rectangular Microchannels as Compared With Theory Based on Arbitrary Cross Section

2009 ◽  
Vol 131 (4) ◽  
Author(s):  
Mohsen Akbari ◽  
David Sinton ◽  
Majid Bahrami
Keyword(s):  
Pressure Drop ◽  
Cross Section ◽  
Soft Lithography ◽  
Rectangular Cross Section ◽  
Streaming Potential ◽  
Arbitrary Cross Section ◽  
Working Fluid ◽  
Aspect Ratios ◽  
Flow Through ◽  
Developed Pressure

Pressure driven liquid flow through rectangular cross-section microchannels is investigated experimentally. Polydimethylsiloxane microchannels are fabricated using soft lithography. Pressure drop data are used to characterize the friction factor over a range of aspect ratios from 0.13 to 0.76 and Reynolds number from 1 to 35 with distilled water as working fluid. Results are compared with the general model developed to predict the fully developed pressure drop in arbitrary cross-section microchannels. Using available theories, effects of different losses, such as developing region, minor flow contraction and expansion, and streaming potential on the measured pressure drop, are investigated. Experimental results compare well with the theory based on the presure drop in channels of arbitrary cross section.

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