Dynamics of lock-release crystalline gravity currents

M. D. Sharifuzzaman, Charles LEMCKERT, Amir Etemad-Shahidi

Research output: Contribution to journalArticle

Abstract

Coastal and marine environments are impacted by inflows of varying types and chemical compositions. This novel study experimentally investigated the dynamics of a particular type of inflow—crystalline gravity currents (CGC) produced by the lock release of over-saturated brine solutions (i.e., they contain a proportion of suspended salt crystals) into a non-stratified ambient. Such flows may occur from desalination and chemical plant discharges. CGCs were found to show two distinguishing characteristics from normal under-saturated gravity currents (UGC). One was that CGCs have longer slumping distances than UGC while the other was that during the self-similar phase, CGCs have a decreasing trend in their velocities, and the current’s height is no longer constant. These differences result because the CGCs drop crystals onto the bed as they advance. Their flow behaviour was also found to be dependent on the flow head density or local density; whereas, UGC flow is a function of the initial fluid density. This unique study gives a significant insight into crystalline gravity currents showing how they can impact the coastal environments they are encountered in, e.g., the discharge vicinity of desalination and chemical plants.
Original languageEnglish
Pages (from-to)213-218
Number of pages6
JournalGeology, Ecology, and Landscapes
Volume14
DOIs
Publication statusPublished - 2017

Fingerprint

gravity
coastal zone
crystal
slumping
brine
marine environment
inflow
chemical composition
salt
fluid
desalination plant
chemical plant

Cite this

Sharifuzzaman, M. D. ; LEMCKERT, Charles ; Etemad-Shahidi, Amir. / Dynamics of lock-release crystalline gravity currents. In: Geology, Ecology, and Landscapes. 2017 ; Vol. 14. pp. 213-218.
@article{d2ba8b78f70b4b0bad3599087de9731e,
title = "Dynamics of lock-release crystalline gravity currents",
abstract = "Coastal and marine environments are impacted by inflows of varying types and chemical compositions. This novel study experimentally investigated the dynamics of a particular type of inflow—crystalline gravity currents (CGC) produced by the lock release of over-saturated brine solutions (i.e., they contain a proportion of suspended salt crystals) into a non-stratified ambient. Such flows may occur from desalination and chemical plant discharges. CGCs were found to show two distinguishing characteristics from normal under-saturated gravity currents (UGC). One was that CGCs have longer slumping distances than UGC while the other was that during the self-similar phase, CGCs have a decreasing trend in their velocities, and the current’s height is no longer constant. These differences result because the CGCs drop crystals onto the bed as they advance. Their flow behaviour was also found to be dependent on the flow head density or local density; whereas, UGC flow is a function of the initial fluid density. This unique study gives a significant insight into crystalline gravity currents showing how they can impact the coastal environments they are encountered in, e.g., the discharge vicinity of desalination and chemical plants.",
keywords = "gravity current, lock exchange, suspended particles",
author = "Sharifuzzaman, {M. D.} and Charles LEMCKERT and Amir Etemad-Shahidi",
year = "2017",
doi = "10.1080/24749508.2017.1389446",
language = "English",
volume = "14",
pages = "213--218",
journal = "Geology, Ecology, and Landscapes",
issn = "2474-9508",

}

Dynamics of lock-release crystalline gravity currents. / Sharifuzzaman, M. D.; LEMCKERT, Charles; Etemad-Shahidi, Amir.

In: Geology, Ecology, and Landscapes, Vol. 14, 2017, p. 213-218.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Dynamics of lock-release crystalline gravity currents

AU - Sharifuzzaman, M. D.

AU - LEMCKERT, Charles

AU - Etemad-Shahidi, Amir

PY - 2017

Y1 - 2017

N2 - Coastal and marine environments are impacted by inflows of varying types and chemical compositions. This novel study experimentally investigated the dynamics of a particular type of inflow—crystalline gravity currents (CGC) produced by the lock release of over-saturated brine solutions (i.e., they contain a proportion of suspended salt crystals) into a non-stratified ambient. Such flows may occur from desalination and chemical plant discharges. CGCs were found to show two distinguishing characteristics from normal under-saturated gravity currents (UGC). One was that CGCs have longer slumping distances than UGC while the other was that during the self-similar phase, CGCs have a decreasing trend in their velocities, and the current’s height is no longer constant. These differences result because the CGCs drop crystals onto the bed as they advance. Their flow behaviour was also found to be dependent on the flow head density or local density; whereas, UGC flow is a function of the initial fluid density. This unique study gives a significant insight into crystalline gravity currents showing how they can impact the coastal environments they are encountered in, e.g., the discharge vicinity of desalination and chemical plants.

AB - Coastal and marine environments are impacted by inflows of varying types and chemical compositions. This novel study experimentally investigated the dynamics of a particular type of inflow—crystalline gravity currents (CGC) produced by the lock release of over-saturated brine solutions (i.e., they contain a proportion of suspended salt crystals) into a non-stratified ambient. Such flows may occur from desalination and chemical plant discharges. CGCs were found to show two distinguishing characteristics from normal under-saturated gravity currents (UGC). One was that CGCs have longer slumping distances than UGC while the other was that during the self-similar phase, CGCs have a decreasing trend in their velocities, and the current’s height is no longer constant. These differences result because the CGCs drop crystals onto the bed as they advance. Their flow behaviour was also found to be dependent on the flow head density or local density; whereas, UGC flow is a function of the initial fluid density. This unique study gives a significant insight into crystalline gravity currents showing how they can impact the coastal environments they are encountered in, e.g., the discharge vicinity of desalination and chemical plants.

KW - gravity current

KW - lock exchange

KW - suspended particles

U2 - 10.1080/24749508.2017.1389446

DO - 10.1080/24749508.2017.1389446

M3 - Article

VL - 14

SP - 213

EP - 218

JO - Geology, Ecology, and Landscapes

JF - Geology, Ecology, and Landscapes

SN - 2474-9508

ER -