scholarly journals A Study of Interactions of Concentration Changes between the Blood Layer and the Gas Layer Using Estimations of Oxygen and Carbon dioxide Transfers in an Oxygenator with a Computational Analysis of Coupled Mass Transfer and Fluid Dynamics

2007 ◽  
Vol 19 (Supplement) ◽  
pp. 78-78
Author(s):  
N. Katagiri ◽  
A. Funakubo ◽  
E. Tatsumi ◽  
T. Tsukiya ◽  
A. Homma ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Carbon Dioxide ◽  
Mass Transfer ◽  
Computational Analysis ◽  
Concentration Changes ◽  
Gas Layer

COMPUTATIONAL ANALYSIS FOR INVESTIGATING THE EFFECTS OF O2 AND CO2 CONCENTRATION CHANGES IN THE GAS LAYER ON GASEOUS TRANSFERS IN AN OXYGENATOR

ASAIO Journal ◽  
2006 ◽  
Vol 52 (2) ◽  
pp. 68A
Author(s):  
Nobumasa Katagiri ◽  
Akio Funakubo ◽  
Tomonori Tsukiya ◽  
Eisuke Tatsumi ◽  
Akihiko Homma ◽  
...  
Keyword(s):  
Computational Analysis ◽  
Co2 Concentration ◽  
Concentration Changes ◽  
Gas Layer

Mass Transfer From a Bubble in a Vertical Pipe

2011 ◽  
Author(s):  
Shogo Hosoda ◽  
Ryosuke Sakata ◽  
Kosuke Hayashi ◽  
Akio Tomiyama
Keyword(s):  
Carbon Dioxide ◽  
Mass Transfer ◽  
Bubble Diameter ◽  
Vertical Pipe ◽  
Oblate Spheroidal ◽  
Wide Range ◽  
Bubble Sizes ◽  
Small Bubbles ◽  
Taylor Bubbles

Mass transfer from single carbon dioxide bubbles in a vertical pipe is measured using a stereoscopic image processing method to develop a mass transfer correlation applicable to a wide range of bubble and pipe diameters. The pipe diameters are 12.5, 18.2 and 25.0 mm and the bubble diameter ranges from 5 to 26 mm. The ratio, λ, of bubble diameter to pipe diameter is therefore varied from 0.2 to 1.8, which covers various bubble shapes such as spherical, oblate spheroidal, wobbling, cap, and Taylor bubbles. Measured Sherwood numbers, Sh, strongly depend on bubble shape, i.e., Sh of Taylor bubbles clearly differs from those of spheroidal and wobbling bubbles. Hence two Sherwood number correlations, which are functions of the Peclet number and the diameter ratio λ, are deduced from the experimental data: one is for small bubbles (λ < 0.6) and the other for Taylor bubbles (λ > 0.6). The applicability of the proposed correlations for the prediction of bubble dissolution process is examined through comparisons between measured and predicted long-term bubble dissolution processes. The predictions are carried out by taking into account the presence of all the gas components in the system of concern, i.e. nitrogen, oxygen and carbon dioxide. As a result, good agreements for the dissolution processes for various bubble sizes and pipe diameters are obtained. It is also demonstrated that it is possible to evaluate an equilibrium bubble diameter and instantaneous volume concentration of carbon dioxide in a bubble using a simple model based on a conservation of gas components.

Modelling heat and mass transfer of a broiler house using computational fluid dynamics

2015 ◽  
Vol 136 ◽  
pp. 25-38 ◽  
Author(s):  
Fernando Rojano ◽  
Pierre-Emmanuel Bournet ◽  
Melynda Hassouna ◽  
Paul Robin ◽  
Murat Kacira ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Mass Transfer ◽  
Computational Fluid Dynamics ◽  
Heat And Mass Transfer ◽  
Broiler House
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