Journal of Fluids Engineering: Recent submissions

Now showing items 2461-2480 of 9024

    • Understanding Tow Tank Measurements of Total Drag for Long Thin Circular Cylinders 

      Jordan, Stephen A. (The American Society of Mechanical Engineers (ASME), 2014)
      Both the experimental measurements and numerical computations tell us that thin circular cylinders own turbulent boundary layer (TBL) characteristics which are dissimilar from planar geometries once the TBL thickness (خ´) ...

    • Gas Bubble Size Measurements in Liquid Mercury Using an Acoustic Spectrometer 

      Wu, Xiongjun; Wendel, Mark; Chahine, Georges; Riemer, Bernie (The American Society of Mechanical Engineers (ASME), 2014)
      A properly dispersed population of small bubbles can mitigate cavitation damage to a spallation neutron source target. In order to measure such a bubble population, an acoustic device was developed and implemented in a ...

    • Vortex Dynamics in the Turbulent Wake of a Single Step Cylinder 

      Morton, C.; Yarusevych, S. (The American Society of Mechanical Engineers (ASME), 2014)
      The turbulent wake development of a circular cylinder with a single stepwise discontinuity in diameter was investigated experimentally using flow visualization and twocomponent Laser Doppler Velocimetry (LDV). A single ...

    • Basic Studies of Flow Instability Inception in Axial Compressors Using Eigenvalue Method 

      Liu, Xiaohua; Sun, Dakun; Sun, Xiaofeng (The American Society of Mechanical Engineers (ASME), 2014)
      This paper applies a theoretical model developed recently to calculate the flowinstability inception of an axial transonic single stage compressor. After several calculation methods are compared, the singular value ...

    • An Analytical Solution for Boundary Layer Flows Over a Moving Flat Porous Plate With Viscous Dissipation 

      Toki, C. J. (The American Society of Mechanical Engineers (ASME), 2014)
      The problem of boundary layer flow of an incompressible fluid over a moving porous flat plate is investigated, by taking into account the heat due to viscous dissipation. The governing boundary layer equations of this flow ...

    • Numerical Analysis of the Internal Flow in an Annular Flow Channel Type Oil Damper 

      Asami, Toshihiko; Honda, Itsuro; Ueyama, Atsushi (The American Society of Mechanical Engineers (ASME), 2014)
      The purpose of the present study is to clarify the fluid flow of an oil damper through numerical analysis in order to obtain an exact value of the damping coefficient of an oil damper. The finite difference method (FDM) ...

    • Use of Pipeline Wave Propagation Model for Measuring Unsteady Flow Rate 

      Johnston, Nigel; Pan, Min; Kudzma, Sylwester; Wang, Pengfei (The American Society of Mechanical Engineers (ASME), 2014)
      A novel method for estimation of unsteady flow rate using pressure at two or three points along a pipeline is described in this paper. The pressure data are processed using a wave propagation model to determine the unsteady ...

    • A Reduced Order Model of the Mean Properties of a Turbulent Wall Boundary Layer at a Zero Pressure Gradient 

      Xu, Lei; Rusak, Zvi; Castillo, Luciano (The American Society of Mechanical Engineers (ASME), 2014)
      A novel twoequations model for computing the flow properties of a spatiallydeveloping, incompressible, zeropressuregradient, turbulent boundary layer over a smooth, flat wall is developed. The mean streamwise velocity ...

    • Pressure Distribution in Confined Jet Flow 

      Liberzon, D.; Fernando, H. J. S. (The American Society of Mechanical Engineers (ASME), 2014)
      A momentum jet injected into a confined container breaks up to “diffusive turbulenceâ€‌ after traveling a critical distance. It has been argued that an adverse pressure gradient developing within the container, acting ...

    • Profile Design and Multifidelity Optimization of Solid Rocket Motor Nozzle 

      Yu, Kuahai; Yang, Xi; Mo, Zhan (The American Society of Mechanical Engineers (ASME), 2014)
      This paper presents a new profile modeling method and multifidelity optimization procedure for the solid rocket motor contoured nozzle design. Two quartic splines are proposed to construct the nozzle divergent section ...

    • Advanced Quasi Steady State Approximation for Chemical Kinetics 

      Girimaji, Sharath S.; Ibrahim, Ashraf A. (The American Society of Mechanical Engineers (ASME), 2014)
      The computational feasibility of many systems with large degrees of freedom such as chemically reacting systems hinges on the reduction of the set to a manageable size with a minimal loss of relevant information. Several ...

    • Velocity and Momentum Decay Characteristics of a Submerged Viscoplastic Jet 

      Hammad, Khaled J. (The American Society of Mechanical Engineers (ASME), 2014)
      Velocity and momentum decay characteristics of a submerged viscoplastic nonNewtonian jet are studied within the steady laminar flow regime. The governing mass and momentum conservation equations along with the Bingham ...

    • Numerical Modeling of Flow Through Phloem Considering Active Loading 

      Jackie Sze, Tsun; Liu, Jin; Dutta, Prashanta (The American Society of Mechanical Engineers (ASME), 2014)
      Transport through phloem is of significant interest in engineering applications, including selfpowered microfluidic pumps. In this paper we present a phloem model, combining protein level mechanics with cellular level fluid ...

    • Level Set, Phase Field, and Immersed Boundary Methods for Two Phase Fluid Flows 

      Hua, Haobo; Shin, Jaemin; Kim, Junseok (The American Society of Mechanical Engineers (ASME), 2014)
      In this paper, we review and compare the level set, phasefield, and immersed boundary methods for incompressible twophase flows. The models are based on modified Navier–Stokes and interface evolution equations. We present ...

    • The Interaction of Porous Material Coating With the Near Wake of Bluff Body 

      Liu, Hanru; Wei, Jinjia; Qu, Zhiguo (The American Society of Mechanical Engineers (ASME), 2014)
      The flow around a circular cylinder with porous material coating (PMC) is numerically investigated based on unsteady Reynoldsaveraged Navier–Stokes (URANS) method at subcritical Reynolds number. The results are compared ...

    • Non Newtonian Liquid Gas Non Uniform Stratified Flow With Interfacial Level Gradient Through Horizontal Tubes 

      Li, Haiwang; Neng Wong, Teck; Skote, Martin; Duan, Fei (The American Society of Mechanical Engineers (ASME), 2014)
      This paper presents the predictions of the axial distribution of liquid level and interfacial level gradient (ILG) for nonuniform nonNewtonian liquidgas flow in horizontal tubes. The nonNewtonian liquid is described using ...

    • Novel Spacer Design Using Topology Optimization in a Reverse Osmosis Channel 

      Oh, Seungjae; Wang, Semyung; Park, Minkyu; Ha Kim, Joon (The American Society of Mechanical Engineers (ASME), 2014)
      The objective of this study is to design spacers using topology optimization in a twodimensional (2D) crossflow reverse osmosis (RO) membrane channel in order to improve the performance of RO processes. This study is the ...

    • Transverse Injection Into a Supersonic Cross Flow Through a Circular Injector With Chevrons 

      Hariharan , Anand Raj; Babu, V. (The American Society of Mechanical Engineers (ASME), 2014)
      Results from 3D, compressible, unsteady Favreaveraged calculations of transverse injection into a supersonic cross flow are reported. Four injector geometries, namely, circular, wedge, diamond, and chevron, have been ...

    • In Situ PLIF and Particle Image Velocimetry Measurements of the Primary Entrainment Fuel Jet in a Naturally Aspirated Water Heater 

      Sherwin, Daniel J.; Koch, Jon D. (The American Society of Mechanical Engineers (ASME), 2014)
      The timeaveraged characteristics of a fuel jet have been measured via acetone planar laserinduced fluorescence (PLIF) and particle image velocimetry (PIV) in the primary mixing region of an operating gasfired water heater. ...

    • Pumping Flow in a Channel With a Peristaltic Wall 

      Tsui, Yeng; Guo, Da; Chen, Shin; Lin, Shi (The American Society of Mechanical Engineers (ASME), 2014)
      Simplified models were widely used for analysis of peristaltic transport caused by contraction and expansion of an extensible tube. Each of these models has its own assumptions, and therefore, weakness. To get rid of the ...