Imperial College London
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Professor Maarten van Reeuwijk

Faculty of Engineering, Department of Civil and Environmental Engineering

Professor of Urban Fluid Mechanics
 
 
 
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Contact

 

+44 (0)20 7594 6059m.vanreeuwijk Website CV

 
 
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Assistant

 

Miss Rebecca Naessens +44 (0)20 7594 5990

 
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Location

 

331Skempton BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Jordan:2021:10.1017/jfm.2021.1001,
author = {Jordan, OH and Rooney, GG and Devenish, BJ and van, Reeuwijk M},
doi = {10.1017/jfm.2021.1001},
journal = {Journal of Fluid Mechanics},
title = {Under pressure: turbulent plumes in a uniform crossflow},
url = {http://dx.doi.org/10.1017/jfm.2021.1001},
volume = {932},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Direct numerical simulation is used to investigate the integral behaviour of buoyant plumessubjected to a uniform crossflow that are infinitely lazy at the source. Neither a plumetrajectory defined by the centre of mass of the plume zc nor a trajectory defined by thecentral streamline zU is aligned with the average streamlines inside the plume. Both zcand zU are shown to correlate with field lines of the total buoyancy flux, which impliesthat a model for the vertical turbulent buoyancy flux is required to faithfully predict theplume angle. A study of the volume conservation equation shows that entrainment due toincorporation of ambient fluid with non-zero velocity due to the increase in the surfacearea (the Leibniz term) is the dominant entrainment mechanism in strong crossflows. Thedata indicate that pressure differences between the top and bottom of the plume play aleading role in the evolution of the horizontal and vertical momentum balances and arecrucial for appropriately modelling plume rise. By direct parameterisation of the verticalbuoyancy flux, the entrainment and the pressure, an integral plume model is developedwhich is in good agreement with the simulations for sufficiently strong crossflow. Aperturbation expansion shows that the current model is an intermediate-range model validfor downstream distances up to 100b–1000b, where b is the buoyancy length scale basedon the flow speed and plume buoyancy flux.
AU  - Jordan,OH
AU  - Rooney,GG
AU  - Devenish,BJ
AU  - van,Reeuwijk M
DO  - 10.1017/jfm.2021.1001
PY  - 2021///
SN  - 0022-1120
TI  - Under pressure: turbulent plumes in a uniform crossflow
T2  - Journal of Fluid Mechanics
UR  - http://dx.doi.org/10.1017/jfm.2021.1001
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000730257000001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://www.cambridge.org/core/journals/journal-of-fluid-mechanics/article/under-pressure-turbulent-plumes-in-a-uniform-crossflow/BA12A387360C382FA8B0899BD58686E2
UR  - http://hdl.handle.net/10044/1/96555
VL  - 932
ER  -
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