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Showing 1 to 14 of 14 for “"Pulsating flow"”.
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Diffusion in pulsating flow in a conduit
… study is to determine the effect of oscillating flow in a conduit in the absence of secondary flow on the rate of mass transfer to the wall, and the parameters that influence the magnitude of the change in the flux. Flow in an artery is pulsatile in nature and it will be shown in a later section …
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Design and evaluation of a pulsating flow wind tunnel
A wind tunnel was designed and built to produce a pulsating flow. The pulsation was achieved by a series of shutters (rotating with constant angular velocity) placed upstream of the settling chamber inlet. The system was optimized to obtain nearly sinusoidal velocity waveforms with the highest …
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Aerothermodynamics and operation of turbine system under unsteady pulsating flow
… of a turbine system operating under highly pulsating flow environment typically found in vehicular turbochargers is made to: identify the key operating parameters, enable the formulation of a reduced order model, delineate the sources of loss and suggest strategies for performance …
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The Determination of Periodic Pulsating Flow in Complex Piping Systems Bythe Impedance Method
Made available in DSpace on 2014-12-09T17:13:46Z (GMT). No. of bitstreams: 1 6901485.pdf: 3825252 bytes, checksum: 8a12f6b1345fcb7f513c3ce814c2e771 (MD5) Previous issue date: 1968
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Heat transfer enhancement phenomena and pressure drop characteristics in two-phase pulsating flow using R-134A
… pressure drop aspect of a saturated two-phase flow imposed to periodic inlet mass flow rate were studied using both experimental and modeling approaches. The two-phase flow of R-134 was tested in a single pass, horizontal smooth copper tube coil with a 6.2 mm (0.244-in.) inner diameter. The …
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Fluid flow measurement using correlation techniques
… cross correlation method to measurement of flow under steady and pulsating flow conditions is investigated. The factors to be considered in applying this technique to different flow systems are discussed and its advantages over the conventional techniques are highlighted. The method involves …
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Heat transfer from a circular cylinder in a pulsating crossflow
… harmonic disturbances in the mean crossflow on heat transfer from a circular cylinder were experimentally determined. Local, time-averaged heat transfer data at constant wall temperature is reported for Reynolds numbers between 3 x 10<sup>4</sup> and 9 x 10<sup>4</sup>. Pulsation …
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Development of Collateral Circulation in Partially Devascularized Feline Sciatic Nerve
… Since the discovery of axioplasmic flow (Weiss, '43; Weiss and Davis, '43) two schools of thought have arisen; one holding that the only essential requirement for normal peripheral nerve function is the anatomical and physiological continuity of the axon with its cell body and that …
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Numerical simulation and experimentation of pulsatile flows in axisymmetric arterial models
… SIMULATION AND EXPERIMENTATION OF PULSATILE FLOWS IN AXISYMMETRIC ARTERIAL MODELS </p> <p>by</p> <p>TADESSE GEBREEGZIABHER</p> <p>December 2011</p> <p>Co-advisors: 1. Dr. Emmanuel Ayorinde 2. Dr. Trilochan Singh</p> <p>Major: Mechanical Engineering </p> <p>Degree: Doctor of Philosophy</p> <p> …
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Numerical Simulation of Unsteady Flows of Physiological Relevance
Pulsatile flows in geometries of physiological relevance have been investigated. Atherosclerotic plaques are (initiated) near junctions and bifurcations in larger arteries. The flow in these regions is characterized by flow separation and unsteadiness, which indicates that local flow conditions …
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Dynamic response of small turbine flowmeters in pulsating liquid flows
The dynamic response of turbine flowmeters in low pressure gas flows (i. e. where the rotational inertia of the fluid is negligible) is well understood and methods for correcting meter signals for a lack of response are available. For liquid flows there has been a limited amount of experimental …
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Modeling on single-sided wind-driven natural ventilation
… rate is difficult due to the bi-directional flow at the opening and the complex flow around buildings. The first part of this study is to develop a simple empirical model for buildings with simple openings. The model is able to accurately predict the mean ventilation rate and fluctuating …
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Simulations of turbulent swirl combustors
… such as precession or vortex formation caused by flow oscillations, as well as various combustion aspects such as localized extinctions and flame lift-off. All the above affect flame stabilization in different ways and are explored through focused simulations. The first study investigates …