Effect of liquid surface tension on small hole distillation sieve tray pressure drop

AIChE Journal ◽  
1995 ◽  
Vol 41 (4) ◽  
pp. 819-827 ◽  
Author(s):  
Michael W. Biddulph ◽  
Christopher P. Thomas
Keyword(s):  
Surface Tension ◽  
Pressure Drop ◽  
Liquid Surface ◽  
Small Hole ◽  
Sieve Tray ◽  
Liquid Surface Tension

scholarly journals Removing Gas from a Closed-End Small Hole by Irradiating Acoustic Waves with Two Frequencies

Micromachines ◽  
2022 ◽  
Vol 13 (1) ◽  
pp. 109
Author(s):  
Yuta Matsumoto ◽  
Yuki Mizushima ◽  
Toshiyuki Sanada
Keyword(s):  
Surface Tension ◽  
Acoustic Waves ◽  
High Speed ◽  
Liquid Surface ◽  
Film Formation ◽  
Small Hole ◽  
Liquid Surface Tension ◽  
Gas Removal ◽  
Trapped Gases ◽  
Air Column

Filling microstructures in the air with liquid or removing trapped gases from a surface in a liquid are required in processes such as cleaning, bonding, and painting. However, it is difficult to deform the gas–liquid interface to fill a small hole with liquid when surface tension has closed one end. Therefore, it is necessary to have an efficient method of removing gas from closed-end holes in liquids. Here, we demonstrate the gas-removing method using acoustic waves from small holes. We observed gas column oscillation by changing the hole size, wettability, and liquid surface tension to clarify the mechanism. First, we found that combining two different frequencies enabled complete gas removal in water within 2 s. From high-speed observation, about half of the removal was dominated by droplet or film formation caused by oscillating the gas column. The other half was dominated by approaching and coalescing the divided gas column. We conclude that the natural frequency of both the air column and the bubbles inside the tube are important.

scholarly journals Trickle/pulse flow regime transition in downflow packed tower involving foaming liquids

2012 ◽  
Vol 18 (3) ◽  
pp. 349-359
Author(s):  
Vijay Sodhi
Keyword(s):  
Surface Tension ◽  
Liquid Flow ◽  
Liquid Surface ◽  
Regime Transition ◽  
Pulse Flow ◽  
Packed Tower ◽  
Flow Rates ◽  
Transition Boundary ◽  
Liquid Surface Tension ◽  
Pulsing Flow

The most of past studies in foaming trickle bed reactors aimed at the improvement of efficiency and operational parameters leads to high economic advantages. Conventionally most of the industries rely on frequently used gas continuous flow (GCF) where operational output is satisfactory but not yields efficiently as in pulsing flow (PF) and foaming pulsing flow (FPF). Hydrodynamic characteristics like regime transitions are significantly influenced by foaming nature of liquid as well as gas and liquid flow rates. This study?s aim was to demonstrate experimentally the effects of liquid flow rate, gas flow rates and liquid surface tension on regime transition. These parameters were analyzed for the air-aqueous Sodium Lauryl Sulphate and air-water systems. More than 240 experiments were done to obtain the transition boundary for trickle flow (GCF) to foaming pulsing flow (PF/FPF) by use excessive foaming 15-60 ppm surfactant compositions. The trickle to pulse flow transition appeared at lower gas and liquid flow rates with decrease in liquid surface tension. All experimental data had been collected and drawn in the form of four different transitional plots which are compared and drawn by using flow coordinates proposed by different researchers. A prominent decrease in dynamic liquid saturation was observed especially during regime transitional change. The reactor two phase pressure evident a sharp rise to verify the regime transition shift from GCF to PF/FPF. Present study reveals, the regime transition boundary significantly influenced by any change in hydrodynamic as well as physiochemical properties including surface tension.

scholarly journals Principle and Characteristics of Microparts Self-alignment using Liquid Surface Tension.

2000 ◽  
Vol 66 (2) ◽  
pp. 282-286 ◽  
Author(s):  
Kaiji SATO ◽  
Tomonori SEKI ◽  
Seiichi HATA ◽  
Akira SHIMOKOHBE
Keyword(s):  
Surface Tension ◽  
Liquid Surface ◽  
Liquid Surface Tension

scholarly journals Measurements and correlations for gas liquid surface tension at high pressure and high temperature

AIChE Journal ◽  
2018 ◽  
Vol 64 (11) ◽  
pp. 4110-4117 ◽  
Author(s):  
C. Leonard ◽  
J-H. Ferrasse ◽  
O. Boutin ◽  
S. Lefevre ◽  
A. Viand
Keyword(s):  
Surface Tension ◽  
High Pressure ◽  
High Temperature ◽  
Liquid Surface ◽  
Liquid Surface Tension

Self-alignment of microparts using liquid surface tension—behavior of micropart and alignment characteristics

2003 ◽  
Vol 27 (1) ◽  
pp. 42-50 ◽  
Author(s):  
Kaiji Sato ◽  
Kentaro Ito ◽  
Seiichi Hata ◽  
Akira Shimokohbe
Keyword(s):  
Surface Tension ◽  
Liquid Surface ◽  
Liquid Surface Tension

scholarly journals Microscale Surface Tension and its Applications

Micromachines ◽  
2019 ◽  
Vol 10 (8) ◽  
pp. 526 ◽  
Author(s):  
Pierre Lambert ◽  
Massimo Mastrangeli
Keyword(s):  
Surface Tension ◽  
Applied Research ◽  
Liquid Surface ◽  
Scientific Investigations ◽  
Liquid Surface Tension

More than 200 years since the earliest scientific investigations by Young, Laplace and Plateau, liquid surface tension is still the object of thriving fundamental and applied research [...]

Sign in / Sign up

Export Citation Format

Share Document