Effect of local property smearing on global variables: Implication for numerical simulations of multiphase flows

H. Haj‐Hariri; Q. Shi; A. Borhan

doi:10.1063/1.868145

Effect of local property smearing on global variables: Implication for numerical simulations of multiphase flows

Physics of Fluids ◽

10.1063/1.868145 ◽

1994 ◽

Vol 6 (8) ◽

pp. 2555-2557 ◽

Cited By ~ 9

Author(s):

H. Haj‐Hariri ◽

Q. Shi ◽

A. Borhan

Keyword(s):

Numerical Simulations ◽

Multiphase Flows ◽

Local Property ◽

Global Variables

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Direct Numerical Simulations of Gas–Liquid Multiphase Flows

10.1017/cbo9780511975264 ◽

2001 ◽

Cited By ~ 151

Author(s):

Grétar Tryggvason ◽

Ruben Scardovelli ◽

Stéphane Zaleski

Keyword(s):

Numerical Simulations ◽

Multiphase Flows ◽

Direct Numerical Simulations

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Turbulent Flows with Drops and Bubbles: What Numerical Simulations Can Tell Us – Freeman Scholar Lecture

Journal of Fluids Engineering ◽

10.1115/1.4050532 ◽

2021 ◽

Author(s):

Giovanni Soligo ◽

Alessio Roccon ◽

Alfredo Soldati

Keyword(s):

Numerical Methods ◽

Best Practices ◽

Numerical Simulations ◽

Turbulent Flows ◽

Multiphase Flows ◽

Simulation Analysis ◽

Droplet Size Distribution ◽

Limited Range ◽

Numerical Resolution ◽

Multi Scale

Abstract Turbulent flows laden with large, deformable drops or bubbles are ubiquitous in nature and in a number of industrial processes. These flows are characterized by a physics acting at many different scales: from the macroscopic length scale of the problem down to the microscopic molecular scale of the interface. Naturally, the numerical resolution of all the scales of the problem, which span about eight to nine orders of magnitude, is not possible, with the consequence that numerical simulations of turbulent multiphase flows impose challenges and require methods able to capture the multi-scale nature of the flow. In this review, we start by describing the numerical methods commonly employed and discussing their advantages and limitations, and then we focus on the issues arising from the limited range of scales that can be possibly solved. Ultimately, the droplet size distribution, a key result of interest for turbulent multiphase flows, is used as a benchmark to compare the capabilities of the different methods and to discuss the main insights that can be drawn from these simulations. Based on this, we define a series of guidelines and best practices that we believe important in the simulation analysis and in the development of new numerical methods.

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Virtual motion of real particles

Journal of Fluid Mechanics ◽

10.1017/s0022112010000765 ◽

2010 ◽

Vol 650 ◽

pp. 1-4 ◽

Cited By ~ 9

Author(s):

G. TRYGGVASON

Keyword(s):

Kinetic Energy ◽

Numerical Simulations ◽

Turbulent Kinetic Energy ◽

Multiphase Flows ◽

Isotropic Turbulence ◽

Finite Size ◽

Direct Numerical Simulations ◽

Spherical Particles ◽

Length Scale ◽

Turbulent Eddies

Direct numerical simulations are rapidly becoming one of the most important techniques to examine the dynamics of multiphase flows. Lucci, Ferrante & Elghobashi (J. Fluid Mech., 2010, this issue, vol. 650, pp. 5–55) address several fundamental issues for spherical particles in isotropic turbulence. They show the importance of including the finite size of the particles and discuss how particles of a size comparable to the largest length scale at which viscosity substantially affects the turbulent eddies (i.e. the Taylor microscale) always increase the dissipation of turbulent kinetic energy.

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