Tensiometer-Pressure Transducer System for Studying Unsteady Flow Through Soils

1972 ◽  
Vol 15 (2) ◽  
pp. 0272-0275 ◽  
Author(s):  
D. W. Fitzsimmons and N. C. Young
Keyword(s):  
Unsteady Flow ◽  
Pressure Transducer ◽  
Flow Through

CFD Comparison of Steady and Unsteady Flow Through a Human Nasal Passage

2009 ◽  
Author(s):  
Brian Savilonis ◽  
Kalen Smith
Keyword(s):  
Unsteady Flow ◽  
Steady Flow ◽  
Flow Behavior ◽  
Flow Dynamics ◽  
Nasal Passage ◽  
Normal Breathing ◽  
Flow Through ◽  
Nasal Flow

Understanding of the transnasal pressure and flow behavior during normal breathing conditions has been a subject of much discussion and research. In particular we are interested in testing the hypothesis of quasi-steady flow as well as the role of turbulence on nasal flow dynamics.

Paper 18: Fluid Dynamic Aspects of Unsteady Flow in Branched Ducts

1967 ◽  
Vol 182 (8) ◽  
pp. 167-174 ◽  
Author(s):  
B. E. L. Deckker ◽  
D. H. Male
Keyword(s):  
Boundary Conditions ◽  
Unsteady Flow ◽  
Fluid Dynamic ◽  
High Amplitude ◽  
Quantitative Information ◽  
Schlieren Method ◽  
Pressure Losses ◽  
Static Pressure Distribution ◽  
Flow Through ◽  
Hydraulic Analogy

Unsteady flow through three-branched pipe configurations has been investigated with the object of finding boundary conditions suitable for use in the analysis of high-amplitude waves using the method of characteristics. The schlieren method and the hydraulic analogy were used to obtain qualitative information about the quasi-steady flow patterns. Quantitative information concerning these patterns was obtained by the measurement of stagnation pressure losses and of the static pressure distribution. Several methods of deriving boundary conditions have been reviewed, and it is considered that those obtained directly by experiment are the most convenient to use.

Fluid-Dynamic Pulsations and Radial Forces in a Centrifugal Pump With Different Impeller Diameters

2005 ◽  
Author(s):  
Eduardo Blanco ◽  
Rau´l Barrio ◽  
Jorge Parrondo ◽  
Jose´ Gonza´lez ◽  
Joaqui´n Ferna´ndez
Keyword(s):  
Unsteady Flow ◽  
Centrifugal Pump ◽  
Flow Rate ◽  
Pressure Fluctuation ◽  
Fluid Dynamic ◽  
Front Wall ◽  
Numerical Predictions ◽  
Radial Forces ◽  
Flow Through ◽  
Radial Gap

A study is presented on the numerical computation of the unsteady flow through a single suction and single volute centrifugal pump equipped with three impellers of different outlet diameter. Computations were performed by means of the Fluent code, solving the 3D URANS equations. The study was focused on the effect of varying the impeller-volute radial gap on the flow perturbations associated to the fluid-dynamic blade-tongue interaction. In order to contrast the numerical predictions, an experimental series of tests was conducted for the pump with the bigger impeller, to obtain pressure fluctuation data along the volute front wall. Finally, the results from the numerical simulations were used to compute the radial forces at the blade passing frequency, as a function of flow-rate and blade-tongue radial gap.

Unsteady flow through screens

Meccanica ◽  
1974 ◽  
Vol 9 (3) ◽  
pp. 165-171
Author(s):  
A. Dadone ◽  
M. Napolitano
Keyword(s):  
Unsteady Flow ◽  
Flow Through
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