热能工程系

Department of Thermal Engineering

Reduced-order Transport Models for Energy and the Environment

报告题目:Reduced-order Transport Models for Energy and the Environment

报 告 人:Zhong Zheng 

报告时间:12月1日  14:00-15:00

报告地点:热能系报告厅 

报告简介:In this talk, I will discuss several reduced-order transport modeling studies motivated by energy and environmental processes: (i) Inspired by CO2 geological storage, we study fluid (CO2) injection into a confined porous reservoir initially saturated with another fluid (brine), and characterize the time evolution of the fluid-fluid (CO2-brine) interface. Because of the effect of confinement, we identify a transition from an early-time self-similar solution to three branches of late-time self-similar solutions for the interface shape. (ii) Inspired by shale gas recovery, we study the fluid-driven cracks in an elastic matrix and characterize the evolution of the crack shape; we also study the elasticity-driven backflow process following fluid injection, and obtain a simple scaling law for the backflow rate of the fracking fluids. (iii) I will also introduce our fundamental study on the viscous fingering instability, which is related to enhanced oil recovery, and report a series of time-dependent strategies for the stabilization of the viscous fingering instability at fluid-fluid (e.g., water-oil, gas-oil) interfaces. I will close the talk by discussing ideas for future exploration and collaboration. 

报告人介绍:Zhong Zheng is currently a David Crighton Fellow in the Department of Applied Mathematics and Theoretical Physics at the University of Cambridge. Before that, he was a Lecturer and Postdoctoral Research Associate in the Department of Mechanical and Aerospace Engineering at Princeton University, and a CMI Young Investigator at the Princeton Environmental Institute. Zhong Zheng received his Bachelor degree from Tsinghua University (Thermal Engineering) and his PhD degree from Princeton University (Mechanical and Aerospace Engineering).

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