Closure to “Discussions of ‘An Efficient Method for Simulating Frequency-Dependent Friction in Transient Liquid Flow’” (1975, ASME J. Fluids Eng., 97, p. 626)

1975 ◽  
Vol 97 (4) ◽  
pp. 626-627
Author(s):  
A. K. Trikha
Keyword(s):  
Liquid Flow ◽  
Efficient Method ◽  
Frequency Dependent

An Efficient Method for Simulating Frequency-Dependent Friction in Transient Liquid Flow

1975 ◽  
Vol 97 (1) ◽  
pp. 97-105 ◽  
Author(s):  
A. K. Trikha
Keyword(s):  
Liquid Flow ◽  
Method Of Characteristics ◽  
Computation Time ◽  
Approximate Expression ◽  
Test System ◽  
Exact Expression ◽  
Frequency Dependent ◽  
Efficient Procedure ◽  
Liquid Line ◽  
Frequency Domains

An efficient procedure is developed for simulating frequency-dependent friction in transient laminar liquid flow by the method of characteristics. The procedure consists of determining an approximate expression for frequency-dependent friction such that the use of this expression requires much less computer storage or computation time than the use of the exact expression. The derived expression for frequency-dependent friction approximates the exact expression very well in both time and frequency domains. Calculated results for a test system are compared with the experimental results so show that the approximate expression predicts accurately the surge pressures, pressure wave distortion as well as pressure attenuation in a liquid line.

A Guaranteed and Efficient Method to Enforce Passivity of Frequency-Dependent Network Equivalents

2017 ◽  
Vol 32 (3) ◽  
pp. 2455-2463 ◽  
Author(s):  
Yizhong Hu ◽  
Wenchuan Wu ◽  
Aniruddha M. Gole ◽  
Boming Zhang
Keyword(s):  
Efficient Method ◽  
Frequency Dependent

scholarly journals Specification of forces in rotational separator

2012 ◽  
Vol 59 (1-2) ◽  
pp. 49-62 ◽  
Author(s):  
Marlena A. Gronowska
Keyword(s):  
Urban Development ◽  
Pressure Distribution ◽  
Liquid Flow ◽  
Efficient Method ◽  
New Technologies ◽  
Environmental Engineering ◽  
Storm Water ◽  
Highly Efficient ◽  
Run Off ◽  
The Future Method

Abstract Today, intensive urban development calls for new technologies in the field of environmental engineering. Extensive infrastructure requires more roads and motorways, as well as larger areas covered with concrete, which altogether leads to greater volumes ofwater creating surface run-off. Rotational separators, besides lamella and coalescence units, may provide a highly efficient method for treatment of storm water running off roads and motorways. This paper is focused on two important aspects of the operation of rotational separators: forces acting on a particle in liquid flow, and pressure distribution in the chamber. The resulting relations constitute crucial elements in the future method of designing such devices.

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