Journal of Fluids Engineering: Recent submissions
Now showing items 2621-2640 of 9024
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Dispersion in Electro Osmotic Flow Through a Slit Channel With Axial Step Changes of Zeta Potential
(The American Society of Mechanical Engineers (ASME), 2013)An analytical study is presented in this paper on hydrodynamic dispersion due to steady electroosmotic flow (EOF) in a slit microchannel with longitudinal step changes of خ¶ potential. The channel wall is periodically ... -
Flow Behavior and Pressure Drop in Porous Disks With Bifurcating Flow Passages
(The American Society of Mechanical Engineers (ASME), 2013)The performance of a porous disk with hierarchical bifurcating flow passages has been examined. The hierarchical bifurcating flow passages in the heat exchanger mimic those seen in the vascular systems of plants and animals. ... -
Vehicles Drag Reduction With Control of Critical Reynolds Number
(The American Society of Mechanical Engineers (ASME), 2013)Various vehicles have been designed as short blunt bodies. Drag coefficients of these bodies are high because adverse pressure gradients cause boundary layer separation from their surfaces, but a reduction of the size of ... -
Pressure Drop Predictions for Laminar Fully Developed Flows of Purely Viscous Non Newtonian Fluids in Circular Ducts
(The American Society of Mechanical Engineers (ASME), 2013)This paper provides the results of numerical calculations of pressure drops and centerline velocities for laminar fullydeveloped flows of nonNewtonian fluids in circular ducts. The particular nonNewtonian fluid model ... -
Numerical Simulation and Modeling of Laminar Developing Flow in Channels and Tubes With Slip
(The American Society of Mechanical Engineers (ASME), 2013)Analytical solutions for slip flows in the hydrodynamic entrance region of tubes and channels are examined. These solutions employ a linearized axial momentum equation using Targ's method. The momentum equation is subjected ... -
Robust and Efficient Setup Procedure for Complex Triangulations in Immersed Boundary Simulations
(The American Society of Mechanical Engineers (ASME), 2013)Immersed boundary methods have been widely used for simulating flows with complex geometries, as quality boundaryconforming grids are usually difficult to generate for complex geometries, especially when motion and/or ... -
Lift Off Behavior of Micro and Nanoparticles in Contact With a Flat Surface
(The American Society of Mechanical Engineers (ASME), 2013)The suspension of small particles from flat surfaces is recognized as a source of pollution and a potential hazard to exposed humans. The interaction of air flow over a particle in contact with a flat surface was studied. ... -
Numerical Calculation of Unsteady Flow Fields: Feasibility of Applying the Weis Fogh Mechanism to Water Turbines
(The American Society of Mechanical Engineers (ASME), 2013)In this study, a reciprocatingtype water turbine model that applies the principle of the WeisFogh mechanism was proposed, and the model's unsteady flow field was calculated by an advanced vortex method. The primary conditions ... -
Exact Solution of AC Electro Osmotic Flow in a Microannulus
(The American Society of Mechanical Engineers (ASME), 2013)The timeperiodic electroosmotic flow in a microannulus is investigated based on the linearized Poisson–Boltzmann equation. An exact solution of the velocity distribution is obtained by using the Green's function approach. ... -
A Generalized Equation for Scattering Cross Section of Spherical Gas Bubbles Oscillating in Liquids Under Acoustic Excitation
(The American Society of Mechanical Engineers (ASME), 2013)When irradiated by acoustic waves, gas bubbles can generate divergent spherical waves, which are frequently used to detect the sizes and number density of the gas bubbles. In this paper, a generalized equation for scattering ... -
Detection of Laminar Flow Separation and Transition on a NACA 0012 Airfoil Using Surface Hot Films
(The American Society of Mechanical Engineers (ASME), 2013)A method for mapping the separation and transition of flow over a slowly pitching airfoil with high angular resolution is presented. An array of surfacemounted hotfilm sensors is used to record simultaneous corresponding ... -
Corrugated Truncated Triangular Tabs for Supersonic Jet Control
(The American Society of Mechanical Engineers (ASME), 2013)An experimental investigation has been carried out to assess the effectiveness of truncated triangular tabs, provided with corrugations (semicircular, triangle, and square shapes) all along their edges, capable of shedding ... -
Novel Fluidic Diode for Hybrid Synthetic Jet Actuator
(The American Society of Mechanical Engineers (ASME), 2013)This paper deals with a new design of a hybrid synthetic jet actuator (HSJA), which is based on a novel fluidic diode. Two fluidic diodes were tested using pressuredrop measurements with air as the working fluid, and their ... -
Very Large Eddy Simulation of Passive Drag Control for a D Shaped Cylinder
(The American Society of Mechanical Engineers (ASME), 2013)The numerical study reported here deals with the passive flow control around a twodimensional Dshaped bluff body at a Reynolds number of Re=3.6أ—104. A small circular control cylinder located in the near wake behind the ... -
Mode II Fatigue Crack Propagation
(The American Society of Mechanical Engineers (ASME), 1971)Fatigue crack propagation rates were obtained for 2024-T3 bare aluminum plates subjected to in-plane, mode I, extensional loads and transverse, mode II, bending loads. These results were compared ... -
A Numerical Investigation of Combustion and Mixture Formation in a Compressed Natural Gas DISI Engine With Centrally Mounted Single Hole Injector
(The American Society of Mechanical Engineers (ASME), 2013)Direct injection of natural gas into the cylinder of spark ignition (SI) engines has shown a great potential to achieve the best fuel economy and reduced emission levels. Since the technology is rather new, incylinder flow ... -
Spatial Temporal Stability of an Electrified Viscoelastic Liquid Jet
(The American Society of Mechanical Engineers (ASME), 2013)This paper presents theoretically the spatialtemporal instability behavior of an electrified viscoelastic liquid jet. Dimensionless parameters have been tested for their influence on the transition of absolute and convective ... -
Prediction of Capillary Tube Adiabatic Flow Properties in the Absence of Precise Geometric Information
(The American Society of Mechanical Engineers (ASME), 2013)Capillary tubes have been used in household refrigerators and other cooling systems for several decades. Complicated geometry, inevitable manufacturing variations, and complex twophase phenomena have been major prohibitory ... -
On the Pressure Ripple Measurement in Variable Displacement Vane Pumps
(The American Society of Mechanical Engineers (ASME), 2013)Vane pumps exhibit pressure ripple in the pressure evolution trend during a complete shaft rotation. Pressure ripple can determine oscillating forces within the system leading to vibration and noise generation. In this ... -
Mechanical Behavior of Uniaxially Loaded Multilayered Cylindrical Composites
(The American Society of Mechanical Engineers (ASME), 1971)An analytical model was developed to predict the mechanical response to axial loading of oriented fiber composite materials containing a third (dissimilar) material at the fiber-matrix interface. ...