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

@misc{van:2024:10.5194/egusphere-egu24-22329,
author = {van, Reeuwijk M and Cui, L and Hughes, G},
doi = {10.5194/egusphere-egu24-22329},
title = {Mixing and entrainment in inclined gravity currents},
type = {Other},
url = {http://dx.doi.org/10.5194/egusphere-egu24-22329},
year = {2024}
}
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RIS format (EndNote, RefMan)

TY  - GEN
AB  - <jats:p>We explore the dynamics of inclined temporal gravity currents using direct numerical simulation, and find that the current creates an environment in which the flux Richardson number, gradient Richardson number and turbulent flux coefficient are constant across a large portion of the depth of the outer layer. Changing the slope angle modifies these mixing parameters, and the flow approaches a maximum Richardson number of approx. 0.15 as the angle tends to zero, for which the entrainment coefficient E->0.The turbulent Prandtl number remains O(1) for all slope angles, demonstrating that E->0 is not caused by a switch-off of the turbulent buoyancy flux. Instead, E->0 occurs as the result of the turbulence intensity going to zero as the angle tends to zero, due to the flow requiring larger and larger shear to maintain the same level of turbulence. We develop a conceptual model which is in excellent agreement with the DNS data.</jats:p>
AU  - van,Reeuwijk M
AU  - Cui,L
AU  - Hughes,G
DO  - 10.5194/egusphere-egu24-22329
PY  - 2024///
TI  - Mixing and entrainment in inclined gravity currents
UR  - http://dx.doi.org/10.5194/egusphere-egu24-22329
ER  -
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