Determination of mass transfer characteristics of co-current two-phase flow within structured packing

Airlift pumps can be used in the aquaculture industry to provide aeration while concurrently moving water utilizing the dynamics of two-phase flow in the pump riser. The oxygen mass transfer that occurs from the injected compressed air to the water in the aquaculture systems can be experimentally investigated to determine the pump aeration capabilities. The objective of this study is to evaluate the effects of various airflow rates as well as the injection methods on the oxygen transfer rate within a dual injector airlift pump system. Experiments were conducted using an airlift pump connected to a vertical pump riser within a recirculating system. Both two-phase flow patterns and the void fraction measurements were used to evaluate the dissolved oxygen mass transfer mechanism through the airlift pump. A dissolved oxygen (DO) sensor was used to determine the DO levels within the airlift pumping system at different operating conditions required by the pump. Flow visualization imaging and particle image velocimetry (PIV) measurements were performed in order to better understand the effects of the two-phase flow patterns on the aeration performance. It was found that the radial injection method reached the saturation point faster at lower airflow rates, whereas the axial method performed better as the airflow rates were increased. The standard oxygen transfer rate (SOTR) and standard aeration efficiency (SAE) were calculated and were found to strongly depend on the injection method as well as the two-phase flow patterns in the pump riser.

Download Full-text

Two phase flow and heat transfer characteristics of a separate-type heat pipe

Heat and Mass Transfer ◽

10.1007/s00231-010-0703-6 ◽

2011 ◽

Vol 47 (7) ◽

pp. 841-846 ◽

Cited By ~ 1

Author(s):

Zhiwei Tang ◽

Aijie Liu ◽

Zhangyan Jiang

Keyword(s):

Heat Transfer ◽

Heat Pipe ◽

Two Phase Flow ◽

Phase Flow ◽

Heat Transfer Characteristics ◽

Two Phase ◽

Separate Type ◽

Transfer Characteristics ◽

Flow And Heat Transfer

Download Full-text

Heat and mass transfer of two-phase flow with Electric double layer effects induced due to peristaltic propulsion in the presence of transverse magnetic field

Journal of Molecular Liquids ◽

10.1016/j.molliq.2017.01.033 ◽

2017 ◽

Vol 230 ◽

pp. 237-246 ◽

Cited By ~ 114

Author(s):

M.M. Bhatti ◽

A. Zeeshan ◽

R. Ellahi ◽

N. Ijaz

Keyword(s):

Magnetic Field ◽

Mass Transfer ◽

Heat And Mass Transfer ◽

Double Layer ◽

Transverse Magnetic Field ◽

Electric Double Layer ◽

Two Phase Flow ◽

Transverse Magnetic ◽

Phase Flow ◽

Two Phase

Download Full-text

A surface renewal model for interfacial heat and mass transfer in transient two-phase flow

International Journal of Multiphase Flow ◽

10.1016/0301-9322(78)90016-2 ◽

1978 ◽

Vol 4 (5-6) ◽

pp. 571-573 ◽

Cited By ~ 21

Author(s):

S. Banerjee

Keyword(s):

Mass Transfer ◽

Heat And Mass Transfer ◽

Two Phase Flow ◽

Phase Flow ◽

Two Phase ◽

Surface Renewal ◽

Renewal Model

Download Full-text

Prediction of Pump Performance Under Air-Water Two-Phase Flow Based on a Bubbly Flow Model

Journal of Fluids Engineering ◽

10.1115/1.2910213 ◽

1993 ◽

Vol 115 (4) ◽

pp. 781-783 ◽

Cited By ~ 6

Author(s):

Kiyoshi Minemura ◽

Tomomi Uchiyama

Keyword(s):

Two Phase Flow ◽

Bubbly Flow ◽

Phase Flow ◽

Centrifugal Pumps ◽

Flow Conditions ◽

Two Phase ◽

Performance Change ◽

Void Fractions ◽

Two Phases

This paper is concerned with the determination of the performance change in centrifugal pumps operating under two-phase flow conditions using the velocities and void fractions calculated under the assumption of an inviscid bubbly flow with slippage between the two phases. The estimated changes in the theoretical head are confirmed with experiments within the range of bubbly flow regime.

Download Full-text