NDLI: Initial mixing of inclined dense jet in perpendicular crossflow

Content Provider	Springer Nature Link
Author	Lai, Chris C. K. Lee, Joseph H. W.
Copyright Year	2013
Abstract	A comprehensive experimental investigation for an inclined ( $$60^{\circ }$$ to vertical) dense jet in perpendicular crossflow—with a three-dimensional trajectory—is reported. The detailed tracer concentration field in the vertical cross-section of the bent-over jet is measured by the laser-induced fluorescence technique for a wide range of jet densimetric Froude number $$Fr$$ and ambient to jet velocity ratios $$U_r$$ . The jet trajectory and dilution determined from a large number of cross-sectional scalar fields are interpreted by the Lagrangian model over the entire range of jet-dominated to crossflow-dominated regimes. The mixing during the ascent phase of the dense jet resembles that of an advected jet or line puff and changes to a negatively buoyant thermal on descent. It is found that the mixing behavior is governed by a crossflow Froude number $$\mathbf{F} = U_r Fr$$ . For $$\mathbf{F} < 0.8$$ , the mixing is jet-dominated and governed by shear entrainment; significant detrainment occurs and the maximum height of rise $$Z_{max}$$ is under-predicted as in the case of a dense jet in stagnant fluid. While the jet trajectory in the horizontal momentum plane is well-predicted, the measurements indicate a greater rise and slower descent. For $$\mathbf{F} \ge 0.8$$ the dense jet becomes significantly bent-over during its ascent phase; the jet mixing is dominated by vortex entrainment. For $$\mathbf{F} \ge 2$$ , the detrainment ceases to have any effect on the jet behavior. The jet trajectory in both the horizontal momentum and buoyancy planes are well predicted by the model. Despite the under-prediction of terminal rise, the jet dilution at a large number of cross-sections covering the ascent and descent of the dense jet are well-predicted. Both the terminal rise and the initial dilution for the inclined jet in perpendicular crossflow are smaller than those of a corresponding vertical jet. Both the maximum terminal rise $$Z_{max}$$ and horizontal lateral penetration $$Y_{max}$$ follow a $$\mathbf{F}^{-1/2}$$ dependence in the crossflow-dominated regime. The initial dilution at terminal rise follows a $$S \sim \mathbf{F}^{1/3}$$ dependence.
Starting Page	25
Ending Page	49
Page Count	25
File Format	PDF
ISSN	15677419
Journal	Environmental Fluid Mechanics
Volume Number	14
Issue Number	1
e-ISSN	15731510
Language	English
Publisher	Springer Netherlands
Publisher Date	2013-06-05
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Mixing and transport Negative buoyant jets Dense jets Desalination Vortex entrainment Jet integral models Earth Sciences Environmental Physics Hydrology/Water Resources Mechanics Hydrogeology Oceanography
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Water Science and Technology

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

Velocity measurements in inclined negatively buoyant jets

Removing the boundary influence on negatively buoyant jets

Twin inclined jets in crossflow: experimental investigation of different flow regimes and jet elevations

Mixing and boundary interactions of 30° and 45° inclined dense jets

Large eddy simulations of 45° inclined dense jets

A modified integral model for negatively buoyant jets in a stationary ambient

K-ε Predictions of the initial mixing of desalination discharges

Simplified Modelling of Inclined Turbulent Dense Jets

Integral Model for Turbulent Buoyant Jets in Unbounded Stratified Flows Part 2: Plane Jet Dynamics Resulting from Multiport Diffuser Jets

Initial mixing of inclined dense jet in perpendicular crossflow

Similar Documents

Velocity measurements in inclined negatively buoyant jets

Removing the boundary influence on negatively buoyant jets

Twin inclined jets in crossflow: experimental investigation of different flow regimes and jet elevations

Mixing and boundary interactions of 30° and 45° inclined dense jets

Large eddy simulations of 45° inclined dense jets

A modified integral model for negatively buoyant jets in a stationary ambient

K-ε Predictions of the initial mixing of desalination discharges

Simplified Modelling of Inclined Turbulent Dense Jets

Integral Model for Turbulent Buoyant Jets in Unbounded Stratified Flows Part 2: Plane Jet Dynamics Resulting from Multiport Diffuser Jets

Initial mixing of inclined dense jet in perpendicular crossflow