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Keywords: viscosity
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Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Fluids Eng. February 2022, 144(2): 021207.
Paper No: FE-21-1087
Published Online: September 15, 2021
... frame system. The performance and flow structure of six liquids with different densities and viscosities were characterized, and the hydraulic, volumetric, and mechanical losses were discomposed. The correction factors of flow rate, head, shaft-power, efficiency, and disk friction power in turbine mode...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Fluids Eng. October 2019, 141(10): 101202.
Paper No: FE-18-1717
Published Online: April 15, 2019
...Abhay Patil; Wenjie Yin; Rahul Agarwal; Adolfo Delgado; Gerald Morrison The affinity law modified for viscosity effects is further extended to include the power input and efficiency. The power input and efficiency data generated using computational fluid dynamics (CFD) are utilized to represent...
Journal Articles
Publisher: ASME
Article Type: Technical Briefs
J. Fluids Eng. July 2014, 136(7): 074501.
Paper No: FE-13-1409
Published Online: May 6, 2014
... was evaluated numerically by using a CFD code. The “sudden-rising head effect” is confirmed to exist at a higher viscosity and a certain large surface roughness. The viscosity and roughness, which make a transition of boundary layer flow pattern in both the impeller and volute to the hydraulically smooth regime...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Fluids Eng. December 2012, 134(12): 121203.
Published Online: November 20, 2012
.... nanofluid Rivlin–Ericksen fluid thermal instability Vadasz number viscosity viscoelasticity The onset of thermal instability in a fluid saturated in a porous medium heated from below is now regarded as a classical problem due to its wide range of applications in geothermal reservoirs...
Journal Articles
Publisher: ASME
Article Type: Multiphase Flows
J. Fluids Eng. June 2012, 134(6): 061301.
Published Online: May 29, 2012
... is an extension of Zhang’s work and is presented as a step toward obtaining a better understanding of the effects of fluid viscosity and sand-particle size on measured and calculated erosion ratios, where erosion ratio is defined as the ratio of mass loss of material to mass of solid particles. The erosion ratios...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Fluids Eng. December 2011, 133(12): 121105.
Published Online: December 23, 2011
... the junction in the vertical segment of the pipe is usually unchanged. Here, new data for air and more viscous liquid are presented. They have been acquired from electrical resistance measurements made between pairs of flush-mounted ring conductance probes located around the junction. Liquid phase viscosities...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Fluids Eng. November 2011, 133(11): 111304.
Published Online: November 11, 2011
... of particles in the calculation domain was investigated, with a focus on the solid shear viscosity. Another purpose of this research was to present the possibility of modeling the development of the vapor phase in the commercial CFD software package, while taking into account the impact of particles...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Fluids Eng. November 2011, 133(11): 111204.
Published Online: November 11, 2011
... scale (SGS) turbulence model, based on a local estimate of the subgrid scale turbulent kinetic energy k sgs and implicit damping of turbulent SGS viscosity ν t ( sgs ) in the near-wall region, was selected as a suitable basis for the present LES computations due to the fact that block structured MPI...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Fluids Eng. November 2011, 133(11): 111104.
Published Online: November 8, 2011
... compressible flow flow separation flow simulation Mach number Navier-Stokes equations numerical analysis stagnation flow subsonic flow viscosity The stall of airfoils is a basic phenomenon in aerodynamics which refers to the significant and sudden loss of lift, increase of drag, and change...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Fluids Eng. November 2011, 133(11): 111105.
Published Online: November 8, 2011
.... Results of this study revealed the leading role of parameters such as viscosity, porosity, density, velocity and mean hydraulic diameter of pores of foam. Since there are several parameters affecting the problem, dimensional analysis was adopted as a convenient approach. Euler number, porosity and two...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Fluids Eng. November 2011, 133(11): 111202.
Published Online: October 19, 2011
... equations for velocity and shear stress profiles were derived for N layers with known viscosities, assuming steady laminar flow in a microchannel driven by pressure and/or electro-static (Coulomb) forces. Numerical simulation results, using a commercial software package, match analytical results for fully...
Journal Articles
Publisher: ASME
Article Type: Technical Briefs
J. Fluids Eng. November 2011, 133(11): 114501.
Published Online: October 13, 2011
... = dimensionless axial perturbation velocity We = Weber number ( v 2 aρ /σ) X = dimensionless axial coordinate x = axial coordinate Z = Ohnesorge number [μ/( ρ σ a ) 0.5 ] Greek Letters ζ = radial development over the jet surface μ = dynamic viscosity ν...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Fluids Eng. October 2011, 133(10): 101208.
Published Online: October 5, 2011
... viscosity drops undergoing unsteady shear flows. The stationary shape and the interfacial velocity of a drop are used in order to obtain the contribution of the drop to the effective stress tensor of the emulsion. A complex rheology including the nonlinear frequency response of the emulsion under...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Fluids Eng. October 2011, 133(10): 101205.
Published Online: October 4, 2011
... not only on droplet mean size, but also on droplet velocity, distribution, events of breakup and collision, Weber number, Ohnesorge number and their evolutions. Conclusions. Results show liquid viscosity has a slight effect on the droplet size and its distribution. While a decrease in liquid surface...
Journal Articles
Publisher: ASME
Article Type: Technical Briefs
J. Fluids Eng. September 2011, 133(9): 094503.
Published Online: September 12, 2011
.... The mixing performance was assessed using flow visualization techniques. The effects of fluid viscosity on mixing time were investigated. The results are very encouraging and are suggestive that the use of synthetic jets in mixing is a viable alternative to the conventional methods of mixing in vessels...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Fluids Eng. August 2011, 133(8): 081301.
Published Online: August 16, 2011
...Jing Yang; Lingjiu Zhou; Zhengwei Wang Cavitation around a hydrofoil has significant three-dimensional features. The full cavitation model and a RNG k−ɛ turbulence model with a modified turbulence viscosity coefficient and which related to the vapor and liquid densities in the cavitating region...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Fluids Eng. July 2011, 133(7): 071201.
Published Online: July 5, 2011
...Kirti Chandra Sahu The nonparallel linear stability analysis of flow through a slowly diverging pipe undergoing viscous heating is considered. The pipe wall is maintained at constant temperatures and Nahme’s law is applied to model the temperature dependence of the fluid viscosity. A one-parameter...
Journal Articles
Publisher: ASME
Article Type: Technical Briefs
J. Fluids Eng. June 2011, 133(6): 064501.
Published Online: June 16, 2011
...Subhendu Maity; Hari Warrior The present state-of-the-art ocean models use an eddy viscosity that depends on structure parameter (C μ ). In this paper we use a Reynolds stress anisotropy based formulation for the eddy viscosity because in addition to the value of turbulent kinetic energy, it also...
Journal Articles
Publisher: ASME
Article Type: Technical Briefs
J. Fluids Eng. April 2011, 133(4): 044502.
Published Online: May 11, 2011
... also increases. Meanwhile, the transferred torque reduces when considering the effect of temperature. 29 05 2010 07 04 2011 11 05 2011 11 05 2011 film flow liquid films oils rotational flow viscosity oil film drive characteristics transferred torque rotating...