An efficient method for simulating frequencydependent friction in transient liquid flow
Abstract
An efficient procedure is developed for simulating frequencydependent friction in transient laminar liquid flow by the method of characteristics. The procedure consists of determining an approximate expression for frequencydependent 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 frequencydependent 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 to show that the approximate expression predicts accurately the surge pressures, pressure wave distortion as well as pressure attenuation in a liquid line.
 Publication:

ASME Journal of Fluids Engineering
 Pub Date:
 March 1975
 Bibcode:
 1975ATJFE..97...97T
 Keywords:

 Flow Characteristics;
 Fluid Transmission Lines;
 Friction Factor;
 Laminar Flow;
 Method Of Characteristics;
 Viscous Fluids;
 Differential Equations;
 Flow Equations;
 Frequency Response;
 Mathematical Models;
 Pressure Distribution;
 Turbulent Flow;
 Fluid Mechanics and Heat Transfer