Journal ArticleDOI
Numerical investigations of turbulent single-phase and two-phase flows in a diffuser
TLDR
In this article, Mansour et al. presented numerical investigations of turbulent single-phase and two-phase flows in a horizontal diverging channel (diffuser), extending their previous experimental work.About:
This article is published in International Journal of Multiphase Flow.The article was published on 2020-09-01. It has received 16 citations till now. The article focuses on the topics: Reynolds stress & Computational fluid dynamics.read more
Citations
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Investigations on the effect of rotational speed on the transport of air-water two-phase flows by centrifugal pumps
TL;DR: In this article , an experimental and numerical investigation on air-water flows in a centrifugal pump is presented, and the results show that increasing the rpm enhances two-phase mixing, which leads to various and significant improvements regarding twophase pumping performance.
Journal ArticleDOI
3D simulation of gas-laden liquid flows in centrifugal pumps and the assessment of two-fluid CFD methods
TL;DR: In this paper, an assessment of a two-fluid model assuming a continuous liquid and a dispersed gas phase for 3D computational fluid dynamics simulations of gas/liquid flow in a centrifugal research pump is performed.
Journal ArticleDOI
Numerical study on water draining process pushed by nitrogen in EAST upper divertor
TL;DR: In this article, the hydraulic characteristics of the developing gas-liquid two-phase flow were investigated in detail by using the FLUENT code, and the results showed that the pressure difference between the inlet and outlet of the cooling channel should be larger than 4 kPa to effectively blow out the residual water from the cooling channels by the nitrogen gas pressure.
Journal ArticleDOI
Assessment of turbulence and cavitation models in prediction of vortex induced cavitating flow in fuel injector nozzles
TL;DR: In this article , the results indicate that the RNG k−ε model and SST k−ω model failed to predict the string cavitation induced by vortex flow in the nozzle due to the drawback of the isotropic vortex-viscosity hypothesis, while the VLES model can provide the predictions of cavitating flow as precise as that using the LES model but on a much coarser mesh.
Journal ArticleDOI
Two-Phase Flow Simulations of Liquid/Gas Transport in Radial Centrifugal Pumps with Special Emphasis On the Transition From Bubbles to Adherent Gas Accumulations
Markus Hundshagen,Kevin Rave,Bich-Diep Nguyen,Sebastian Popp,Christian Hasse,Michael K. Mansour,Dominique Thévenin,Romuald Skoda +7 more
TL;DR: In this article , a hybrid flow solver is adopted based on an Euler-Euler two-fluid method for dispersed flows and features Volume-of-Fluid properties when air accumulations form.
References
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Journal ArticleDOI
Two-equation eddy-viscosity turbulence models for engineering applications
TL;DR: In this paper, two new two-equation eddy-viscosity turbulence models are presented, which combine different elements of existing models that are considered superior to their alternatives.
Journal ArticleDOI
Volume of fluid (VOF) method for the dynamics of free boundaries
C.W Hirt,B. D. Nichols +1 more
TL;DR: In this paper, the concept of a fractional volume of fluid (VOF) has been used to approximate free boundaries in finite-difference numerical simulations, which is shown to be more flexible and efficient than other methods for treating complicated free boundary configurations.
Proceedings ArticleDOI
A one-equation turbulence model for aerodynamic flows
Philippe R. Spalart,S. Allmaras +1 more
Journal ArticleDOI
A continuum method for modeling surface tension
TL;DR: In this paper, a force density proportional to the surface curvature of constant color is defined at each point in the transition region; this force-density is normalized in such a way that the conventional description of surface tension on an interface is recovered when the ratio of local transition-reion thickness to local curvature radius approaches zero.
Book
An Introduction to Computational Fluid Dynamics: The Finite Volume Method
TL;DR: This chapter discusses the development of the Finite Volume Method for Diffusion Problems, a method for solving pressure-Velocity Coupling in Steady Flows problems, and its applications.