NDLI: DNS study of swirling intensity effect on flow pattern of a circular jet

Content Provider	Springer Nature Link
Author	Zhou, Zhijun Lv, Yu He, Pei Zhou, Junhu Cen, Kefa
Copyright Year	2009
Abstract	The figures show the 3D flow pattern of a circular jet with different swirling intensity. Reynolds number is approximately 4300 computed based on the nozzle diameter (d), jet velocity (U), and air fluid property at 1 atm and 300 K. The overall computational domain is set to be 4 × 4 × 12 d in spanwise, height, and streamwise direction. The governing equations are the fully compressible Navier–Stokes equations, firstly differenced by eighth-order explicit scheme and then advanced temporarily by using the fourth-order explicit Runge–Kutta method. 3D characteristics non-reflecting boundary condition including transverse source contribution is imposed on all other boundaries except the inflow boundary handled by assigning fixed profiles of temperature and velocity. To ensure the simulation resolution, here over 16 million grids are employed in sum, combined with a handful of grids located at buffer zones of outflow boundaries. To correctly represent the vortex in the flow field, velocity gradient tensor invariant Q is used here. And ψ refers to the swirling intensity defined as the ratio of tangential momentum to axis momentum. As shown in velocity profile, the flow pattern of the jet changes from a close mode to a totally open mode as ψ increases from 0.4 to 1.5. Accordingly, the recirculation zone gradually moves upstream and backflow velocity is enlarged as well. It is inteseting to found that the obvious drops of the momentums in two shown directions always occur at the same position downstream, no matter how large the ψ value is. Therefore, a momentum compensatory mechanism is expected to exist in the vortex-abundant zone. With the increase of ψ value, the increased strain rate in tangential direction can induce vortex more quickly, intensifying the entrainment and velocity-attenuation, which can be observed in Q value profile.
Starting Page	3
Ending Page	4
Page Count	2
File Format	PDF
ISSN	13438875
Journal	Journal of Visualization
Volume Number	13
Issue Number	1
e-ISSN	18758975
Language	English
Publisher	Springer-Verlag
Publisher Date	2009-12-08
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Classical Continuum Physics Computer Imaging, Vision, Pattern Recognition and Graphics Engineering Fluid Dynamics Engineering Thermodynamics, Heat and Mass Transfer
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic 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

Visualization of circular subsonic jet flow by DNS

Velocity profiles with swirling flow in a vertical circular tube

Flow and heat transfer characteristics of circular impinging jet accompanying annular suction flow

Flow images of a low reynolds number annular swirling jet

Azimuthal flow patterns produced by annular swirling jets

The role of visualization in clarifying interfacial heat and mass transfer mechanisms

Turbulent pulsed jet

Visualization of swirling flows in champagne glasses

Visualization of nonpremixed hydrogen jet flame in a vitiated coflow by DNS

DNS study of swirling intensity effect on flow pattern of a circular jet

Similar Documents

Visualization of circular subsonic jet flow by DNS

Velocity profiles with swirling flow in a vertical circular tube

Flow and heat transfer characteristics of circular impinging jet accompanying annular suction flow

Flow images of a low reynolds number annular swirling jet

Azimuthal flow patterns produced by annular swirling jets

The role of visualization in clarifying interfacial heat and mass transfer mechanisms

Turbulent pulsed jet

Visualization of swirling flows in champagne glasses

Visualization of nonpremixed hydrogen jet flame in a vitiated coflow by DNS

DNS study of swirling intensity effect on flow pattern of a circular jet