Journal of Fluids Engineering: Recent submissions

Now showing items 1441-1460 of 9024

    • Entropy Generation for Bypass Transitional Boundary Layers 

      Skifton, Richard S.; Budwig, Ralph S.; Crepeau, John C.; Xing, Tao (The American Society of Mechanical Engineers (ASME), 2017)
      The principal purpose of this study is to understand the entropy generation rate in bypass, transitional, boundary-layer flow better. The experimental work utilized particle image velocimetry (PIV) and particle tracking ...

    • Investigations on Bluff Bodies as Improved Vortex Shedders Placed Inside a Circular Pipe 

      Venugopal, A.; Agrawal, Amit; Prabhu, S. V. (The American Society of Mechanical Engineers (ASME), 2017)
      In the present study, we visualize the turbulent wake of various bluff bodies placed inside a circular pipe. The objective is to identify shapes which are strong vortex generators and incur minimum irrecoverable pressure ...

    • A Cubic Nonlinear Subgrid-Scale Model for Large Eddy Simulation 

      Xianbei, Huang; Zhuqing, Liu; Wei, Yang; Yaojun, Li; Zixuan, Yang (The American Society of Mechanical Engineers (ASME), 2017)
      In this paper, a new cubic subgrid-scale (SGS) model is proposed to capture the rotation effect. Different from the conventional nonlinear model with second-order term, the new model contains a cubic term which is originated ...

    • Torque Converter Capacity Improvement Through Cavitation Control by Design 

      Liu, Cheng; Wei, Wei; Yan, Qingdong; Weaver, Brian K. (The American Society of Mechanical Engineers (ASME), 2017)
      Heavy cavitation in torque converters can have a significant effect on hydrodynamic performance, particularly with regards to the torque capacity. The objective of this study is to therefore investigate the effects of pump ...

    • Slip Flow in Eccentric Annuli 

      Alassar, R. S. (The American Society of Mechanical Engineers (ASME), 2017)
      A solution of the problem of Poiseuille slip flow through an eccentric cylindrical annulus is obtained in bipolar coordinates. The solution is in excellent agreement with the two published limiting cases of slip flow through ...

    • Vortex Rope Formation in a High Head Model Francis Turbine 

      Goyal, Rahul; Cervantes, Michel J.; Gandhi, B. K. (The American Society of Mechanical Engineers (ASME), 2017)
      Francis turbine working at off-design operating condition experiences high swirling flow at the runner outlet. In the present study, a high head model Francis turbine was experimentally investigated during load rejection, ...

    • Pressure Drop Through Orifices for Single- and Two-Phase Vertically Upward Flow—Implication for Metering 

      Zeghloul, Ammar; Azzi, Abdelwahid; Saidj, Faiza; Messilem, Abdelkader; Azzopardi, Barry James (The American Society of Mechanical Engineers (ASME), 2017)
      Pressure drop has been measured for upward single- and two-phase gas–liquid flow across an orifice in a vertical pipe. A conductance probe provided average void fraction upstream of the orifice. Six orifices with different ...

    • Hydraulic Loss of Finite Length Dividing Junctions 

      Tomor, András; Kristóf, Gergely (The American Society of Mechanical Engineers (ASME), 2017)
      A general hydraulic loss coefficient correlation for perpendicular, cylindrical, finite length dividing pipe junctions is developed and implemented in a discrete dividing-flow manifold model. Dividing-flow manifolds are ...

    • Characteristics of the Wake Behind a Transversely Oscillating Cylinder Near a Wall 

      Peter, S.; De, A. K. (The American Society of Mechanical Engineers (ASME), 2017)
      In the present study, numerical investigation is carried out for flow past a transversely oscillating circular cylinder near a wall. A second-order finite-volume method employing diffuse interface immersed boundary method ...

    • Analysis of the Staggered and Fixed Cavitation Phenomenon Observed in Centrifugal Pumps Employing a Gap Drainage Impeller 

      Zhu, Bing; Chen, Hongxun (The American Society of Mechanical Engineers (ASME), 2017)
      Previous work has shown that the employment of a gap drainage impeller in a centrifugal pump can improve the pump's hydraulic performance and cavitation resistance. However, during experiments, an unconventional cavitation ...

    • Studying Effects of Fence and Sheltering on the Aerodynamic Forces Experienced by Parabolic Trough Solar Collectors 

      Baniamerian, Zahra; Mehdipour, Ramin (The American Society of Mechanical Engineers (ASME), 2017)
      Influences of proper fence installation around solar farms for decreasing aerodynamic factors due to wind force on parabolic trough collectors are comprehensively studied using two-dimensional computational fluid dynamics ...

    • Fast and Accurate Approximations for the Colebrook Equation 

      Biberg, Dag (The American Society of Mechanical Engineers (ASME), 2017)
      The standard expression for pipe friction calculations, the Colebrook equation, is in an implicit form. Here, we present two accurate approximate solutions, given by replacing the numerically unstable term in Keady's exact ...

    • Aerodynamic Performance Prediction of a Profile in Ground Effect With and Without a Gurney Flap 

      Cravero, Carlo (The American Society of Mechanical Engineers (ASME), 2017)
      A very detailed experimental case of a reversed profile in ground effect has been selected in the open literature where available experimental data have been used as reference data for the computational fluid dynamics (CFD) ...

    • Probing and Imaging of Vapor–Water Mixture Properties Inside Partial/Cloud Cavitating Flows 

      Wan, Churui; Wang, Benlong; Wang, Qian; Fang, Yongliu; Liu, Hua; Zhang, Guoping; Xu, Lianghao; Peng, Xiaoxing (The American Society of Mechanical Engineers (ASME), 2017)
      Experimental results of the void fraction, statistical chord length distribution (CLD), and bubble size distribution (BSD) inside and downstream of hydrodynamic cavities are presented at the laboratory scale. Various ...

    • Automated Design for Microfluid Flow Sculpting: Multiresolution Approaches, Efficient Encoding, and CUDA Implementation 

      Stoecklein, Daniel; Davies, Michael; Wubshet, Nadab; Le, Jonathan; Ganapathysubramanian, Baskar (The American Society of Mechanical Engineers (ASME), 2017)
      Sculpting inertial fluid flow using sequences of pillars is a powerful method for flow control in microfluidic devices. Since its recent debut, flow sculpting has been used in novel manufacturing approaches such as microfiber ...

    • Scaling Laws for the Peak Overpressure of a Cannon Blast 

      Carson, Robert A.; Sahni, Onkar (The American Society of Mechanical Engineers (ASME), 2017)
      For large cannons, blast overpressure can have a detrimental effect on the crew in the near field (i.e., within a distance of 50 tube diameters or calibers from the muzzle center) as well as on the support personnel and ...

    • Numerical Investigations of Pressure Distribution Inside a Ventilated Supercavity 

      Cao, Lei; Karn, Ashish; Arndt, Roger E. A.; Wang, Zhengwei; Hong, Jiarong (The American Society of Mechanical Engineers (ASME), 2017)
      A numerical study has been conducted on the internal pressure distribution of a ventilated supercavity generated from a backward facing cavitator under different air entrainment coefficients, Froude numbers, and blockage ...

    • Characterization of Tab-Induced Counter-Rotating Vortex Pair for Mixing Applications 

      Park, Jeongmoon; Pagan-Vazquez, Axy; Alvarado, Jorge L.; Chamorro, Leonardo P.; Lux, Scott M.; Marsh, Charles P. (The American Society of Mechanical Engineers (ASME), 2017)
      An experimental and numerical investigation was carried out to explore the effects of four vortex generators (VG) on the onset of flow instabilities, the paths and characteristics of the induced coherent counter-rotating ...

    • The Wingtip Vortex of a Dimpled Wing With an Endplate 

      Beves, Christopher C.; Barber, Tracie J. (The American Society of Mechanical Engineers (ASME), 2017)
      Dimples used as sub-boundary layer vortex generators have been shown to reduce wake size at large angles of incidence. The effect these dimples have on wingtip vortices with an endplate is measured via laser Doppler ...

    • A Recommended Correction to the kT−kL−ω Transition-Sensitive Eddy-Viscosity Model 

      Lopez, Maurin; Keith Walters, D. (The American Society of Mechanical Engineers (ASME), 2017)
      A physics-based modification to the kT−kL−ω transition-sensitive eddy-viscosity model is presented. The modification corrects an anomaly related to the physical mechanism of production of laminar kinetic energy for regions ...