Direct Numerical Simulations towards predicting complex multiphase flows
Speaker: Prashant Valluri
Affiliation: School of Engineering, University of Edinburgh, UK
Time: 4:00PM
Date: Wednesday, April 10th 2013
Location: Merrion Room, Ground Floor, NexusUCD, University College Dublin. Blocks 9 & 10, Belfield Office Park
Abstract:
The use of direct numerical simulations towards predicting complex multiphase flows common to industry is presented by means of several examples. These concern with mainly two classes of interfacial flows: gas-liquid flows with and without phase change, and solid-liquid flows. The talk will not only focus on the development of numerics and the optimisation for parallel performance on supercomputing clusters at Edinburgh but also present key recent results. These examples concern with three applications: cooling micro-electronic devices via phase-change fluids, understanding hydrate flows in oil/gas pipelines and post-combustion carbon-capture using amine absorption. The DNS help reveal the rich spatiotemporal behaviour in unprecedented detail of the combinatorial transport phenomena within these applications. Understanding the interplay between heat, mass and momentum transfer is crucial towards developing simpler practical models for technology transfer to the industry. The examples also demonstrate the difficult but surmountable challenges that we still face.
Bio:
Dr. Prashant Valluri is a Lecturer in Chemical Engineering in the School of Engineering, University of Edinburgh. He is based at the Institute for Materials and Processes and his main research interests lie in understanding the dynamics of unsteady multiphase flows via development of bespoke numerical and analytical modelling methods. These include stability theory, turbulence, combined heat-mass-momentum transport such as flows with phase change, and flows with mass-transfer and interfacial-reactions. Specifically, when applied towards crucial current day problems in energy (e.g. oil-gas pipeline transport and process equipment efficiency), health (e.g. microfluidic DNA-Enzyme interaction) and environmental sectors (e.g. subsea oil jets/plumes, carbon-capture and industrial cleaning). He collaborates extensively with theoreticians & experimentalists based in the UK and abroad and the Edinburgh Parallel Computing Centre & HECToR. He is a member of the Multiphase Flows and Complex Fluids group in the Institute and is also involved with the UK Carbon Capture and Storage Research Centre. He is also an EPSRC-NOISE and STEMNET ambassador.
Tea/coffee will be provided.
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