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Showing 1 to 19 of 19 for “"slip flow"”.
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Protein LC-MS Using Slip Flow Chromatography
… often leads to the loss of PTM information. Slip flow chromatography with orderly packed nonporous silica particles has been shown to greatly increase the efficiency of protein separation by reducing eddy diffusion and resistance to mass transfer. In this work, higher resolution for intact …
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Slip Flow Over an Enclosed Rotating Disk
Made available in DSpace on 2014-12-05T19:16:03Z (GMT). No. of bitstreams: 1 6303327.pdf: 3162745 bytes, checksum: e0f443b13eb1f613cdb5786754e25980 (MD5) Previous issue date: 1962
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Measurement and Control of Slip-Flow Boundary Conditions at Solid-Gas Interfaces
… thesis describes measurements of the gas-solid flow boundary condition at moderate Knudsen number, i.e., where the dimensions of the flow are similar to the mean free path, and thus partial slip is expected. This regime has become more important with increased focus on nano-scale devices, but …
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Graetz problem for slip flow in a channel in the presence of axial conduction, viscous dissipation and flow work
… in laminar, hydrodynamically fully developed slip flow in a channel with a constant wall temperature. Slip flow is a good approximation when the Knudsen number, the ratio of the molecular mean free path to the channel width, is less than approximately 0.1. Our analysis includes the effects of …
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Enhanced Laminar Convective Heat Transfer using Microstructured Superhydrophobic Surfaces
… to the surface. For many cases, the classical no slip boundary condition holds true. However, there are a subset of situations where this assumption is not valid, and slip between the surface and fluid must be considered. One such example is a micropatterned, superhydrophobic surface, which has …
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Estimation Of Tangential Momentum Accommodation Coefficient Using Molecular Dynamics Simulation
… (TMAC) is used to improve the accuracy of fluid flow calculations in the slip flow regime. Under such conditions (indicated by Knudsen number greater than 0.001), the continuum assumption that a fluid velocity at a solid surface is equal to the surface velocity is inaccurate because relatively …
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A numerical method for electro-kinetic flow with deformable interfaces
We consider two-phase flow of ionic fluids whose motion is driven by an imposed electric field. At a fluid-fluid interface, a screening cloud of ions develops and forms an electro-chemical double layer or 'Debye layer'. The applied electric field acts on the ionic cloud it induces, resulting in a …
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Concrete at high temperatures: hygro-thermo-mechanical degradation of concrete
… is developed. Furthermore, the effect of the slip flow effect is included and several state equations, including relative permeability and saturation vapour pressure, are adopted. Additionally, the effect of polypropylene fibres as a spalling prevention technique is modelled via a modification …
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The Effects of Rarefaction and Thermal Non-Equilibrium on a Blunt Body and a Bicone in Hypersonic Flow and Their Shape Optimization for Reducing Both Drag and Heat Transfer
… since they need to travel through different flow regimes due to changes in the density of the atmosphere with altitude. Some of the key characteristics associated with hypersonic flow are extremely high temperatures and heat transfer to the wall of the spacecraft. At these temperatures, the …
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Flow mechanisms and numerical simulation of gas production from shale reservoirs
… study, the deviation against conventional gas flow have been detected in the lab experiments for gas flow through nano membranes. Based on the experimental results, a new apparent permeability expression is proposed with considering viscous flow, Knudsen diffusion, and slip flow. The gas flow …
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Prediction and control of sound propagation in turbofan engine bypass ducts
… of sound in acoustically lined ducts<br/>with flow. The motivation for this work is the requirement to predict the sound attenuation of<br/>acoustic liners in the bypass duct of modern turbofan aeroengines. The liners provide the most<br/>effective means with which to suppress the rear fan …
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Investigation of Particle Velocity and Drag with Spherical and Non-Spherical Particles Through a Backward Facing Step
… a turbulent accelerating or decelerating gaseous flow. The large density variation between phases creates the potential for significant differences in velocity known as velocity slip. Flow over a backward facing step provides a well characterized, turbulent, decelerating flow useful for measuring …
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The consequence of station blackout in a nuclear power plant
… and compared with primary pumps seal leakage flow rates from Westinghouse analysis. Westinghouse assumptions and analysis predicts the primary pump seal leakage during Station Black Out accident to a value of 54m³/h. The Westinghouse predictions were independently verified by Energy Technology …
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Thermorheology and processing of polyethylene blends : macromolecular structure effects
… the amplitude of the oscillations in the stick-slip flow regime, known as oscillating melt fracture, were found to scale with the weight fraction of LDPE. Amounts as low as 1 wt% LDPE have a significant effect on the amplitude of pressure oscillations. These effects are clearly due to the …
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3 dimensional flow and thermal modelling of the friction stir welding process
… is the localised deformation and material flow around the FSW tool. Various authors have used analytical and numerical thermal models to predict the weld microstructure and residual stress and distortion. However these models have not yet been able to predict the conditions whereby a …
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Experimental Investigation of Particle Lag behind a Shock Wave using a Novel Laser Doppler Accelerometer
Determination of particle slip is a major concern for particle based measurements in un- heated supersonic facilities, as it is a limiting factor for the instruments' frequency response. For the purpose of determining the particle deceleration through a stationary shock wave in a super sonic …
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ΜΕΛΕΤΗ ΤΟΥ ΟΡΙΑΚΟΥ ΣΤΡΩΜΑΤΟΣ ΣΥΜΠΙΕΣΤΟΥ ΡΕΥΣΤΟΥ ΜΕ ΕΦΑΡΜΟΓΗ ΜΑΓΝΗΤΙΚΟΥ ΠΕΔΙΟΥ ΚΑΙ ΕΓΧΥΣΗ ΞΕΝΟΥ ΡΕΥΣΤΟΥ
… HYDROGEN CONCENTRATION IS TAKEN INTO ACCOUNT. SLIP BOUNDARY CONDITIONSARE PROVIDED TO SIMULATE DEPARTURE FROM THE CONTINUUM FLOW. A NUMERICAL MODEL IS DERIVED PREDICTING THE TEMPERATURE VELOCITY AND HYDROGEN CONCENTRATION PROFILES. IT IS SHOWN THAT THE PRESENCE OF A LIGHT GAS AND OF A MODERATE …