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Rakulan Sivanesapillai

Dr.-Ing.
Rakulan Sivanesapillai

Dieses Bild zeigt  Rakulan Sivanesapillai
E-Mail
Adresse
Universität Stuttgart
Institut für Mechanik (Bauwesen)
Lehrstuhl für Kontinuumsmechanik
Pfaffenwaldring 7
70569 Stuttgart
Deutschland

Fachgebiet:

Pore-Scale Analysis of Multiphase Flow in Porous Media

Seemingly continuous macroscopic flow of two or more immiscible fluid phases through a network of pore bodies and pore throats is accompanied by a number of microscale pore-level displacement events which are rather discrete in time. For example, when a non-wetting fluid displaces an initially saturating wetting fluid (drainage), discrete pore-body invasions (Haines jump) as well as discrete changes in interfacial area (coalescence,choke-off) occur. We perform pore-level numerical studies using Smoothed Particle Hydrodynamics to study the effects of pore-level events on corresponding macroscopic theories for capillary-force dominant flows.

Inertial Flow through Porous Media

We numerically analyse porous flow phenomena on the scale of the pore network throughout a large range of Reynolds numbers covering the coarse-grained Darcy flow regime, the weak-inertia regime and the strong-inertia regime. Current macroscopic theories are lacking coherency in their description of inertial flow through porous media despite its relevance in many natural ( double-porosity flows in fractured reservoirs ) and technical applications ( e.g. flow in catalytic converters ). Through the use of the mesh-free Lagrangian method Smoothed Particle Hydrodynamics (SPH), we discuss the transition of effective macroscopic hydraulic properties including apparent permeability, hydraulic tortuosity and specific drag.
Publikationen:

[Begutachtet]

R. Sivanesapillai
Pore-scale study of non-darcian fluid flow in porous media using smoothed-particle hydrodynamics,
PhD thesis, Ruhr-Universität Bochum, 2016.

R. Sivanesapillai, H. Steeb
On the pore-scale evolution of fluid interfaces during viscous-dominated primary drainage in partially wettable porous media ,
S
ubmitted, 2016.

D. Markauskas, H. Kruggel-Emden, R. Sivanesapillai, H. Steeb
Comparative study on mesh-based and mesh-less coupled CFD-DEM methods to model particle-laden flow.
Powder Technology, doi:10.1016/j.powtec.2016.09.052, 305 78-88, 2016

R. Sivanesapillai, N. Falkner, A. Hartmaier, H. Steeb
A CSF-SPH Method for Simulating Drainage and Imbibition at Pore-Scale Resolution while Tracking Interfacial Areas.
Advances in Water Resources, doi:10.1016/j.advwatres.2015.08.012, 95, 212-234, 2016.

R. Sivanesapillai, H. Steeb, A. Hartmaier
Transition of effective hydraulic properties from low to high Reynolds number flow in porous media.
Geophysical Research Letters, doi:10.1002/2014GL060232, 41(14): 4920-4928, 2014.

S. Brinckmann, R. Sivanesapillai, A. Hartmaier
On the formation of vacancies by edge dislocation dipole annihilation in fatigued copper.
International Journal of Fatiguedoi:10.1016/j.ijfatigue.2011.05.004, 33(10): 1369-1375, 2011.

[Tagungsberichte]

R. Sivanesapillai, H. Steeb
On the predictive capabilities of a multiphase SPH model for hydrodynamic spreading dynamics .
Proc. Appl. Math. Mech., doi: 10.1002/pamm.201610294, 16, 611-612, 2016.

Ghobadi, E., Sivanesapillai, R., Musialak, J. & H.Steeb 
Thermo-rheological characterization of polyetherurethane: Parameter optimization and validation.
In B. Marvalova & I. Petrikova (Eds.), Constitutive Models for Rubber IX.
Paper presented at Ninth European Conference on Constitutive Models for Rubber (Czech Republic), Prague, 2015, pp. 157-163. London: Taylor & Francis Group.

Uribe, D., Osorno, M., Sivanesapillai, R., Steeb, H.& Ruiz, O.
Determining the limits of geometrical tortuosity from seepage flow calculations in porous media.
Proc. Appl. Math. Mech., doi: 10.1002/pamm.201410214, 14: 453–454, 2014.

Lebenslauf:

04/2005 Erlangung der allgemeinen Hochschulreife (Abitur) 
07/2005-03/2006 Zivildienst
09/2006-11/2011 Hochschulstudium Maschinenbau an der Ruhr-Universität Bochum
11/2011 Abschluss: Dipl.-Ing. Maschinenbau - Vertiefung der angewandten Mechanik
02/2012-01/2016 

Wissenschaftlicher Angestellter am Institut für Mechanik, Lehrstuhl für Kontinuumsmechanik, Ruhr-Universität Bochum

seit 02/2016

Wissenschaftlicher Angestellter am Institut für Mechanik im Bauwesen, Lehrstuhl für Kontinuumsmechanik, Universität Stuttgart

07/2016

Promotion (Dr.-Ing.) an der Fakultät für Maschinenbau der Ruhr-Universität Bochum