Mobility and stresslet functions of particles with rough surfaces in viscous fluids: A numerical study

1991 ◽  
Vol 35 (5) ◽  
pp. 797-823 ◽  
Author(s):  
Peyman Pakdel ◽  
Sangtae Kim
Keyword(s):  
Numerical Study ◽  
Rough Surfaces ◽  
Viscous Fluids

A phase field numerical study of 3D bubble rising in viscous fluids under an electric field

2014 ◽  
Vol 78 ◽  
pp. 820-829 ◽  
Author(s):  
Qingzhen Yang ◽  
Ben Q. Li ◽  
Jinyou Shao ◽  
Yucheng Ding
Keyword(s):  
Electric Field ◽  
Phase Field ◽  
Numerical Study ◽  
Viscous Fluids ◽  
Bubble Rising

scholarly journals Wall laws for viscous fluids near rough surfaces

2012 ◽  
Vol 37 ◽  
pp. 117-135 ◽  
Author(s):  
Dorin Bucur ◽  
Anne-Laure Dalibard ◽  
David Gérard-Varet
Keyword(s):  
Rough Surfaces ◽  
Viscous Fluids

Random rough surfaces: numerical study of localized electromagnetic surface modes

1993 ◽  
Vol 32 (19) ◽  
pp. 3354 ◽  
Author(s):  
M. Saillard
Keyword(s):  
Numerical Study ◽  
Rough Surfaces ◽  
Surface Modes ◽  
Random Rough Surfaces

A numerical study on the sedimentation of adhesive particles in viscous fluids using LBM-LES-DEM

2021 ◽  
Author(s):  
Hongsheng Chen ◽  
Wenwei Liu ◽  
Zhiwei Chen ◽  
Zhong Zheng
Keyword(s):  
Numerical Study ◽  
Viscous Fluids

scholarly journals Experimental and Numerical Study of Micropitting Initiation in Real Rough Surfaces in a Micro-elastohydrodynamic Lubrication Regime

2018 ◽  
Vol 66 (4) ◽  
Author(s):  
M. F. AL-Mayali ◽  
S. Hutt ◽  
K. J. Sharif ◽  
A. Clarke ◽  
H. P. Evans
Keyword(s):  
Numerical Study ◽  
Rough Surfaces ◽  
Elastohydrodynamic Lubrication ◽  
Lubrication Regime

scholarly journals Wetting of doubly periodic rough surfaces in Wenzel’s regime

2018 ◽  
Vol 145 ◽  
pp. 03006
Author(s):  
Stanimir Iliev ◽  
Nina Pesheva ◽  
Pavel Iliev
Keyword(s):  
Contact Angle ◽  
Contact Line ◽  
Numerical Study ◽  
Rough Surfaces ◽  
Contact Angle Hysteresis ◽  
Stick Slip ◽  
Liquid Meniscus ◽  
Three Phase ◽  
Mutual Disposition ◽  
Physical Defects

In this work we present preliminary results from our numerical study of the shapes of a liquid meniscus in contact with doubly sinusoidal rough surfaces in Wenzel’s wetting regime. Using the full capillary model we obtain the advancing and the receding equilibrium meniscus shapes for a broad interval of surface roughness factors. The contact angle hysteresis is obtained when the three-phase contact line is located on one row (block case) or several rows (kink case) of physical defects. We find that depending on the mutual disposition of the contact line and the lattice of periodic defects, different stick-slip behaviors of the contact line depinning mechanism appear, leading to different values of the contact angle hysteresis.

Numerical Study of the Influence of Viscosity on the Performance of an Electrical Submersible Pump

2013 ◽  
Author(s):  
Thiago Sirino ◽  
Henrique Stel ◽  
Rigoberto E. M. Morales
Keyword(s):  
Pressure Difference ◽  
Numerical Study ◽  
Viscous Fluids ◽  
Design Flow ◽  
Submersible Pump ◽  
Flow Rates ◽  
Offshore Oil Production ◽  
Static Pressure Difference ◽  
Electrical Submersible Pump ◽  
Complex Phenomena

This work presents a numerical analysis on the influence of viscosity on the performance of a semi-axial electrical submersible pump (ESP) such as the ones used in offshore petroleum production. A single stage composed of an impeller with seven blades and a diffuser with seven vanes is considered. Flow simulations for water and other fluids with viscosities ranging from 60 to 1020 cP were performed with the aid of Computational Fluid Dynamics, and both design and off-design flow rates and impeller speeds were investigated. The numerical model was validated with experimental measurements of the static pressure difference on a given stage of a three-stage ESP system. Results showed good agreement between the computed and the measured pressure difference values. Analyzes of the water flow inside the pump revealed that the flow is blade-oriented at the best efficiency point as expected, while large separation zones are found in the impeller and diffuser channels for part-load conditions. However, flow is not strictly blade-oriented at the best efficiency point for fluids other than the water. Examination of performance for water and fluids with higher viscosities shows that similarity laws are restricted for water, and that the best efficiency point is shifted when considering viscous fluids. Also, head values for viscous fluids are degraded not just due to viscosity and high flow rates, but also with rotor speed. The flow pattern analysis and the results found may provide useful information for engineers concerned with highly viscous fluid pumping and, possibly, shed some light on the understanding of more complex phenomena associated with actual offshore oil production operations such as multiphase pumping of viscous fluids.

Numerical study on gas dispersion characteristics of a coaxial mixer with viscous fluids

2016 ◽  
Vol 66 ◽  
pp. 54-61 ◽  
Author(s):  
Baoqing Liu ◽  
Bolin Huang ◽  
Yanan Zhang ◽  
Jingliang Liu ◽  
Zhijiang Jin
Keyword(s):  
Numerical Study ◽  
Viscous Fluids ◽  
Dispersion Characteristics ◽  
Gas Dispersion

A numerical study of mixing intensification for highly viscous fluids in multistage rotor-stator mixers

2021 ◽  
Author(s):  
Liying Chen ◽  
Junheng Guo ◽  
Wenpeng Li ◽  
Shuchun Zhao ◽  
Wei Li ◽  
...  
Keyword(s):  
Numerical Study ◽  
Viscous Fluids ◽  
Mixing Intensification
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