NDLI: Effects of longitudinal grooves on the Couette

Content Provider	Springer Nature Link
Author	Mohammadi, A. Floryan, J. M.
Copyright Year	2014
Abstract	The effects of longitudinal grooves on the flow resistance in a channel where the flow is driven by movement of one of the walls and modified by a streamwise pressure gradient have been studied. The reducedorder geometrymodel has been used to extract geometric features that are hydraulically relevant. Three distinct zones leading to the reduced resistance have been identified, depending on the flow pressure gradient and the groove wave number. Two of these zones correspond to grooves with long wavelengths and one to grooves with short wavelengths. Optimization has been used to determine shapes that provide the largest flow rate. In the case of the long-wavelength grooves, the optimal shapes depend on the constraints. These shapes are well approximated by a certain universal trapezoid for grooves that have the same height and depth. There exists an optimum depth which, combined with the corresponding shape, defines the optimal geometry in the case of the unequal-depth grooves; this shape is well approximated by a Gaussian function. No optimal shape exists for the short-wavelength grooves if the groove amplitude is sufficiently small; the shortest admissible wavelength dominates system performance under such conditions. The most effective groove wave number does exist for higher grooves, but the optimal shape cannot be determined due to numerical limitations.
Starting Page	549
Ending Page	572
Page Count	24
File Format	PDF
ISSN	09354964
Journal	Theoretical and Computational Fluid Dynamics
Volume Number	28
Issue Number	5
e-ISSN	14322250
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-10-10
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Drag reduction Laminar flows Channel flows Longitudinal grooves Optimization Engineering Fluid Dynamics Classical Continuum Physics Computational Science and Engineering
Content Type	Text
Resource Type	Article
Subject	Fluid Flow and Transfer Processes Condensed Matter Physics Computational Mechanics

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

Use of natural instabilities for generation of streamwise vortices in a laminar channel flow

Superfluid Couette flow in an enclosed annulus

Global instabilities in diverging channel flows

Convective and absolute instabilities in counter-rotating spiral Poiseuille flow

A vorticity stretching diagnostic for turbulent and transitional flows

Inertia-driven particle migration and mixing in a wall-bounded laminar suspension flow

On modelling transitional turbulent flows using under-resolved direct numerical simulations: the case of plane Couette flow

Ground effects on separated laminar flows past an inclined flat plate

Special issue on magnetohydrodynamic flows

Effects of longitudinal grooves on the Couette–Poiseuille flow

Similar Documents

Use of natural instabilities for generation of streamwise vortices in a laminar channel flow

Superfluid Couette flow in an enclosed annulus

Global instabilities in diverging channel flows

Convective and absolute instabilities in counter-rotating spiral Poiseuille flow

A vorticity stretching diagnostic for turbulent and transitional flows

Inertia-driven particle migration and mixing in a wall-bounded laminar suspension flow

On modelling transitional turbulent flows using under-resolved direct numerical simulations: the case of plane Couette flow

Ground effects on separated laminar flows past an inclined flat plate

Special issue on magnetohydrodynamic flows

Effects of longitudinal grooves on the Couette–Poiseuille flow