SAE_2017-01-1552.pdf (2.28 MB)
Coupled level-set volume of fluid simulations of water flowing over a simplified drainage channel with and without air coflow
journal contribution
posted on 2017-03-23, 09:27 authored by Mehriar Dianat, Maciej Skarysz, Graham Hodgson, Andrew GarmoryAndrew Garmory, Martin PassmoreThe motivation for this paper is to predict the flow of water over exterior surfaces of road vehicles. We present simulations of liquid flows on solid surfaces under the influence of gravity with and without the addition of aerodynamic forces on the liquid. This is done using an implementation of a Coupled Level Set Volume of Fluid method (CLSVOF) multiphase approach implemented in the open source OpenFOAM CFD code. This is a high fidelity interface-resolving method that solves for the velocity field in both phases without restrictions on the flow regime. In the current paper the suitability of the approach to Exterior Water Management (EWM) is demonstrated using the representative test cases of a continuous liquid rivulet flowing along an inclined surface with a channel located downstream perpendicular to the oncoming flow. Experimental work has been carried out to record the motion of the rivulet in this case and also to measure the contact angle of the liquid with the solid surface. The measurements of the liquid/solid characteristics such as equilibrium and dynamic contact angles are described along with the analytical expression for contact angle vs. capillary
number used in the CFD code. The results from the simulations are compared to experimental measurements. The simulations are
carried out with air co-flows of 0, 0.5 and 10 m/s. The simulations are seen to reproduce physical phenomena such as the liquid pinning at sharp corners and the longitudinal stretching of the rivulet with higher air velocity.
Funding
This work was supported by Jaguar Land Rover and the UK Engineering and Physical Sciences Research Council grant EP/K014102/1 as part of the jointly funded Programme for Simulation Innovation. Calculations were performed on HPC-Midlands funded by the UK EPSRC, Grant EP/K000063/1.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Aeronautical and Automotive Engineering
Published in
SAE International Journal of Passenger Cars - Mechanical SystemsVolume
10Issue
1Citation
DIANAT, M. ... et al, 2017. Coupled level-set volume of fluid simulations of water flowing over a simplified drainage channel with and without air coflow. SAE International Journal of Passenger Cars - Mechanical Systems, 10 (1), pp. 369-377.Publisher
© SAE InternationalVersion
- VoR (Version of Record)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Acceptance date
2017-02-17Publication date
2017-03-28Notes
This paper was accepted for publication in the journal SAE International Journal of Passenger Cars - Mechanical Systems and is also available at http://dx.doi.org/10.4271/2017-01-1552.ISSN
1946-4002Publisher version
Language
- en