NDLI: Simulations of a double-diffusive interface in the diffusive convection regime

Please wait, while we are loading the content...

Simulations of a double-diffusive interface in the diffusive convection regime

Content Provider	Scilit
Author	Carpenter, J. R. Sommer, T. Wüest, A.
Copyright Year	2012
Description	Three-dimensional direct numerical simulations are performed that give us an in-depth account of the evolution and structure of the double-diffusive interface. We examine the diffusive convection regime, which, in the oceanographically relevant case, consists of relatively cold fresh water above warm salty water. A ‘double-boundary-layer’ structure is found in all of the simulations, in which the temperature ( $T$ ) interface has a greater thickness than the salinity ( $S$ ) interface. Therefore, thin gravitationally unstable boundary layers are maintained at the edges of the diffusive interface. The $TS$ -interface thickness ratio is found to scale with the diffusivity ratio in a consistent manner once the shear across the boundary layers is accounted for. The turbulence present in the mixed layers is not able to penetrate the stable stratification of the interface core, and the $TS$ -fluxes through the core are given by their molecular diffusion values. Interface growth in time is found to be determined by molecular diffusion of the $S$ -interface, in agreement with a previous theory. The stability of the boundary layers is also considered, where we find boundary layer Rayleigh numbers that are an order of magnitude lower than previously assumed.
Related Links	https://www.dora.lib4ri.ch/eawag/islandora/object/eawag:7127/datastream/PDF/Carpenter-2012-Simulations_of_a_double-diffusive_interface-(published_version).pdf https://www.cambridge.org/core/services/aop-cambridge-core/content/view/63D2ECE2AA41439E01A01F9A0D76F2E2/S0022112012003990a.pdf/div-class-title-simulations-of-a-double-diffusive-interface-in-the-diffusive-convection-regime-div.pdf
Ending Page	436
Page Count	26
Starting Page	411
ISSN	00221120
e-ISSN	14697645
DOI	10.1017/jfm.2012.399
Journal	Journal of Fluid Mechanics
Volume Number	711
Language	English
Publisher	Cambridge University Press (CUP)
Publisher Date	2012-11-25
Access Restriction	Open
Subject Keyword	Journal of Fluid Mechanics Fluids and Plasmas Physics Double Diffusive Convection Ocean Processes Stratified Flows
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Mechanics of Materials Condensed Matter Physics Mechanical Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in