Concentration-based velocity reconstruction in convective Hele–Shaw flows

Mobin Alipour, Marco De Paoli, Alfredo Soldati
2020 Experiments in Fluids  
We examine the process of convective dissolution in a Hele-Shaw cell. We consider a one-sided configuration and we propose a newly developed method to reconstruct the velocity field from concentration measurements. The great advantage of this Concentration-based Velocity Reconstruction (CVR) method consists of providing both concentration and velocity fields with a single snapshot of the experiment recorded in high resolution. We benchmark our method vis-à-vis against numerical simulations in
more » ... e instance of Darcy flows, and we also include dispersive effects to the reconstruction process of non-Darcy flows. The absence of laser sources and the presence of one low-speed camera make this method a safe, accurate, and cost-effective alternative to classical PIV/PTV velocimetry processes. Finally, as an example of possible application, we employ the CVR method to analyse the tip splitting phenomena.
doi:10.1007/s00348-020-03016-3 fatcat:zefpghkk2rbdjbpp3e74bkykgq