My primary role currently lies with the University of Oxford as a Hooke Research Fellow in the Mathematical Institute until August 2020. Please see my institutional homepage for the latest research updates. During this period I will also be acting as honorary research associate within the Department of Mathematics in Imperial College London, undertaking co-supervision roles, as well as conducting research in the areas of asymptotic methods for interfacial flows, computational fluid dynamics and industrial mathematics.
As a post-doctoral research associate in the Department of Mathematics until July 2017, I was affiliated the Applied Mathematics and Mathematical Physics Section and member of the Fluid Dynamics and LFC-UK (Laminar Flow Control) groups, working with Prof. Demetrios T. Papageorgiou and Prof. Anatoly I. Ruban.
My research was concentrated on the theoretical and numerical study of fluid-fluid interfaces in immiscible multi-layer flows, with a particular focus in electrohydrodynamic control in microfluidics. Past projects revolved around the control and suppression of the Rayleigh-Taylor instability via electric fields, while more recent efforts have been dedicated towards topics such as enhanced microfluidic mixing, electrohydrodynamically induced pumping and polymer self-assembly in confined geometries. Additionally, I am involved in high Reynolds number flow studies of droplet impact and water retention on solid surfaces, as well as the effect of the resulting thin liquid films on the influence of boundary-layer separation (multiple deck theory). The common core of the projects consists in the physical modelling approach, theoretical (asymptotic) exploration, followed by validation and extension to highly nonlinear regimes via direct numerical simulations (DNS). Efforts are directed towards obtaining results of practical significance in a wide range of applications, with several successful industrial partnerships built in either academic or consultancy roles.
Cimpeanu R, Moore MR, 2018, Early-time jet formation in liquid-liquid impact problems: theory and simulations, Journal of Fluid Mechanics, Vol:856, ISSN:0022-1120, Pages:764-796
Cimpeanu R, Papageorgiou DT, 2018, Three-dimensional high speed drop impact onto solid surfaces at arbitrary angles, International Journal of Multiphase Flow, ISSN:0301-9322
et al., 2017, Electric field stabilization of viscous liquid layers coating the underside of a surface, Physical Review Fluids, Vol:2, ISSN:2469-990X
et al., 2016, Capturing nonlinear dynamics of two-fluid Couette flows with asymptotic models, Journal of Fluid Mechanics, Vol:806, ISSN:1469-7645, Pages:R1-R13
Cimpeanu R, Martinsson A, Heil M, 2015, A parameter-free perfectly matched layer formulation for the finite-element-based solution of the Helmholtz equation, Journal of Computational Physics, Vol:296, ISSN:1090-2716, Pages:329-347
Cimpeanu R, Papageorgiou DT, Petropoulos PG, 2014, On the control and suppression of the Rayleigh-Taylor instability using electric fields, Physics of Fluids, Vol:26, ISSN:1070-6631