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Evolution of a Negatively Buoyant Jet in the Near and Intermediate Field

Bashitialshaaer, Raed LU ; Persson, Kenneth M LU and Larson, Magnus LU (2011) International Desalination Association (IDA) World Congress, 2011 In International Desalination Association (IDA) World Congress
Abstract
The most common situation connection with freshwater production from sea water (desalination) is producing a brine waste stream, usually discharged back into sea water. The purpose of this study is to explore the behavior of a dense jet and bottom plume, composed of brine water of heavier effluent into a quiescent homogeneous ambient, discharged into a receiving body of lighter fresh water (tank).In this study, a mathematical model was developed to simulate the jet and plume behavior in order to determine the optimum discharge conditions for different scenarios. The model was divided into two sub-models, describing respectively the near and intermediate field properties of the discharge for different inclinations and bottom slope. The... (More)
The most common situation connection with freshwater production from sea water (desalination) is producing a brine waste stream, usually discharged back into sea water. The purpose of this study is to explore the behavior of a dense jet and bottom plume, composed of brine water of heavier effluent into a quiescent homogeneous ambient, discharged into a receiving body of lighter fresh water (tank).In this study, a mathematical model was developed to simulate the jet and plume behavior in order to determine the optimum discharge conditions for different scenarios. The model was divided into two sub-models, describing respectively the near and intermediate field properties of the discharge for different inclinations and bottom slope. The lateral spreading and electrical conductivity was also described through a generalization of measured data.

A Matlab code developed describing the lateral spreading and centerline dilution of buoyant jet and plumes for near and intermediate field was developed. The model produces results in acceptable agreement with data and observations, even though some improvements should be made in order to give the correct weight to the bottom slope parameter and to reduce the need for user calibration. An overall assessment of the CORMIX software behavior cannot be made; in our case (i.e. small scale) the software was not giving simulation results that reproduced the data.

This study has limited result for only 16% bottom slope and 30 degrees inclination. Concentration was improved with the bottom slope by 10% than the horizontal bottoms and improved by about 40% with bottom slope together with inclination of 30 degrees. The suggestion in the practical applications concerning desalination brines and similar discharge of heavy wastes is to have inclination and bottom slope together. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Desalination, Negatively Buoyant Jet, Near and Intermediate Field, Matlab, CORMIX, Brine discharge.
in
International Desalination Association (IDA) World Congress
pages
12 pages
publisher
IDA-International Desalination Association
conference name
International Desalination Association (IDA) World Congress, 2011
project
MERGE
language
English
LU publication?
yes
id
75b10eb6-ce15-4740-b26a-b9901fd100c0 (old id 2027082)
date added to LUP
2011-08-02 15:59:46
date last changed
2016-05-03 09:48:02
@misc{75b10eb6-ce15-4740-b26a-b9901fd100c0,
  abstract     = {The most common situation connection with freshwater production from sea water (desalination) is producing a brine waste stream, usually discharged back into sea water. The purpose of this study is to explore the behavior of a dense jet and bottom plume, composed of brine water of heavier effluent into a quiescent homogeneous ambient, discharged into a receiving body of lighter fresh water (tank).In this study, a mathematical model was developed to simulate the jet and plume behavior in order to determine the optimum discharge conditions for different scenarios. The model was divided into two sub-models, describing respectively the near and intermediate field properties of the discharge for different inclinations and bottom slope. The lateral spreading and electrical conductivity was also described through a generalization of measured data.<br/><br>
A Matlab code developed describing the lateral spreading and centerline dilution of buoyant jet and plumes for near and intermediate field was developed. The model produces results in acceptable agreement with data and observations, even though some improvements should be made in order to give the correct weight to the bottom slope parameter and to reduce the need for user calibration. An overall assessment of the CORMIX software behavior cannot be made; in our case (i.e. small scale) the software was not giving simulation results that reproduced the data. <br/><br>
This study has limited result for only 16% bottom slope and 30 degrees inclination. Concentration was improved with the bottom slope by 10% than the horizontal bottoms and improved by about 40% with bottom slope together with inclination of 30 degrees. The suggestion in the practical applications concerning desalination brines and similar discharge of heavy wastes is to have inclination and bottom slope together.},
  author       = {Bashitialshaaer, Raed and Persson, Kenneth M and Larson, Magnus},
  keyword      = {Desalination,Negatively Buoyant Jet,Near and Intermediate Field,Matlab,CORMIX,Brine discharge.},
  language     = {eng},
  pages        = {12},
  publisher    = {ARRAY(0x9272a20)},
  series       = {International Desalination Association (IDA) World Congress},
  title        = {Evolution of a Negatively Buoyant Jet in the Near and Intermediate Field},
  year         = {2011},
}