14-17 May 2018
New Orleans
US/Central timezone

The dynamics of fluid deformation in Darcy scale porous media and impact on mixing

17 May 2018, 08:50
15m
New Orleans

New Orleans

Oral 20 Minutes MS 4.15: Lagrangian methods for scalar transport in porous media Parallel 9-G

Speaker

Marco Dentz (IDAEA-CSIC)

Description

Stretching and compression of fluid elements is key for the understanding and quantification mixing and reaction in heterogeneous porous media. We quantify the evolution of the deformation tensor in 2 and 3 dimensional Darcy-scale porous media flows using streamline coordinates. Thus, we derive a stochastic process for the stretching of a material strip in terms of a coupled continuous
time random walk which is parameterized by the statistical medium and flow properties. The derived model is compared to direct numerical simulation of flow, particle motion and Lagrangian deformation. The impact on mixing is studied for the evolution of a diffusive material blob in heterogeneous Darcy scale flow.

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Primary author

Marco Dentz (IDAEA-CSIC)

Co-authors

Prof. Aditya Bandopadhyay (IIT Kharagpur) Dr Daniel Lester (RMIT University Melbourne) Prof. Tanguy Le Borgne (University of Rennes) Prof. Felipe de Barros (University of Southern California)

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