Validation of closure models for interfacial drag and turbulence in numerical simulations of horizontal stratified gas–liquid flows

2014 ◽  
Vol 62 ◽  
pp. 1-16 ◽  
Author(s):  
Thomas Höhne ◽  
Jan-Peter Mehlhoop
Keyword(s):  
Numerical Simulations ◽  
Closure Models ◽  
Liquid Flows ◽  
Interfacial Drag

COMPARISON OF NUMERICAL SIMULATIONS WITH EXPERIMENTAL DATA FOR VERTICAL ANNULAR AND CHURN GAS-LIQUID FLOWS

2020 ◽  
Author(s):  
Larissa Steiger de Freitas ◽  
Marcus Vinícius Canhoto Alves ◽  
Rafael Rodrigues Francisco
Keyword(s):  
Experimental Data ◽  
Numerical Simulations ◽  
Liquid Flows

Numerical Simulations of Liquid−Liquid Flows in Microchannels

2010 ◽  
Vol 49 (21) ◽  
pp. 10606-10614 ◽  
Author(s):  
Richa Raj ◽  
Nikita Mathur ◽  
Vivek V. Buwa
Keyword(s):  
Numerical Simulations ◽  
Liquid Flows

Numerical Simulation of Room Airflow Using Different Closure Models and Grid Generation Schemes

2002 ◽  
Author(s):  
Anupreet Singh ◽  
Mohammad H. Hosni ◽  
Walter R. Schwarz
Keyword(s):  
Numerical Simulation ◽  
Numerical Simulations ◽  
Cross Sections ◽  
Heat Rate ◽  
Grid Generation ◽  
Computer Hardware ◽  
Experimental Investigations ◽  
Human Thermal Comfort ◽  
Closure Models ◽  
Technological Advances

Proper distribution of conditioned air plays an important role in both human thermal comfort and indoor air quality. Experimental investigations of airflow and temperature distributions for typical indoor environmental conditions are essential but expensive and time consuming. Technological advances in computer hardware and development of computational software in recent years have made numerical simulations of such flow conditions possible. The objectives of this study were to: (1) Evaluate the applicability of a commercial software in conducting numerical simulations of indoor airflow conditions for both isothermal and non-isothermal conditions using different turbulence closure models, and (2) Determine the effects of different grid generation techniques on the numerical results. The computations were performed for a large rectangular geometry room. Conditioned air entered the room through a high sidewall grille located on one side of the wall and exited through a return located on the opposite side of wall. All walls and ceiling were insulated. The floor was heated at a constant heat rate. This paper presents velocity, temperature, and turbulent kinetic energy profiles at various cross-sections. Good agreements between the numerical simulation results and experimental data were achieved.

Numerical Simulations of Droplets on the Hydrophobic and Hydrophilic Walls by Lattice Boltzmann Method

2011 ◽  
Author(s):  
Yosuke Matsukuma ◽  
Gen Inoue ◽  
Masaki Minemoto
Keyword(s):  
Porous Structure ◽  
Numerical Simulations ◽  
Lattice Boltzmann Method ◽  
Lattice Boltzmann ◽  
Complex Geometry ◽  
Packed Bed ◽  
Wall Friction ◽  
Porous Structures ◽  
Liquid Flows ◽  
Boltzmann Method

Gas-liquid flows in/on porous structures are simulated by using of the two-phase Lattice Boltzmann method (LBM), in which the wetting boundary conditions on solid wall with complex geometry are incorporated. The complex geometry simulating the packed bed is numerically constructed by the discrete element method (DEM). It is confirmed that structure of the simulated packed bed is similar to the actual bed by comparison of wall friction factor. Next the behaviors of droplet on the porous structures are simulated with different wetting properties. For hydrophilic cases, the droplets set on the porous structure at initial stage penetrated into the porous structure as time marching on and spread in the bed. It was shown that the droplet behavior depends on the surface tension and its viscosity. From these numerical simulations, the applicability of LBM to Gas-liquid flows in/on porous structures was confirmed.

Numerical simulations of fully developed turbulent liquid flows in micro tubes

2001 ◽  
Vol 11 (3) ◽  
pp. 175-180 ◽  
Author(s):  
D Xu ◽  
T Y Ng ◽  
L S Pan ◽  
K Y Lam ◽  
Hua Li
Keyword(s):  
Numerical Simulations ◽  
Liquid Flows

Development of a Lagrangian-Lagrangian Coupling Method in Solid-Liquid Flows Involving Free Surface

2011 ◽  
Author(s):  
Y. Yamada ◽  
M. Sakai ◽  
S. Mizutani ◽  
S. Koshizuka ◽  
T. Nonoue ◽  
...  
Keyword(s):  
Free Surface ◽  
Numerical Simulations ◽  
Multiphase Flows ◽  
Industrial Area ◽  
High Viscosity ◽  
Coupling Method ◽  
Complex Flows ◽  
Numerical Studies ◽  
Liquid Flows ◽  
Solid Liquid

In the industrial area, handling solid-liquid multiphase flows involving free surface is one of the most important problems. However, numerical studies on these complex flows have not been done so far. In this study, we develop a new method to simulate the solid-liquid flows with high viscosity. Lagrangian approaches were employed in the liquid and solid coupling method. Numerical simulations were performed to show the adequacy of this model.

Numerical Simulation of Dispersed Gas/Liquid Flows in Bubble Columns at High Phase Fractions using OpenFOAM®. Part II - Numerical Simulations and Results

2011 ◽  
Vol 34 (8) ◽  
pp. 1321-1327 ◽  
Author(s):  
H. Marschall ◽  
R. Mornhinweg ◽  
A. Kossmann ◽  
S. Oberhauser ◽  
K. Langbein ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Numerical Simulations ◽  
Bubble Columns ◽  
Liquid Flows ◽  
High Phase
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