學(xué) 術(shù) 報(bào) 告
報(bào)告題目：
多組分液相混合物的相分離 (Phase behavior and morphologyof multicomponent liquid mixtures)
時(shí)間： 2019年2月27日（星期三）上午11:00
地點(diǎn)： 柏彥大廈19層（1912）
報(bào)告人：毛晟博士（普林斯頓大學(xué)機(jī)械工程及航空航天
系博士后研究員）
邀請(qǐng)人：徐曄
Abstract:
Multicomponentsystems are ubiquitous in nature and industry. While the physics of binary andternary liquid mixtures is well-understood, the thermodynamic and kineticproperties of N-component mixtures with N>3 have remained relativelyunexplored. Inspired by recent examples of intracellular phase separation, weinvestigate equilibrium phase behavior and morphology of N-component liquidmixtures within the Flory-Huggins theory of regular solutions. In order todetermine the number of coexisting phases and their compositions, we developeda new algorithm for constructing complete phase diagrams, based on numericalconvexification of the discretized free energy landscape. Together with aCahn-Hilliard approach for kinetics, we employ this method to study mixtureswith N=4 and 5 components. We report on both the coarsening behavior of suchsystems, as well as the resulting morphologies in 3D. We discuss how the numberof coexisting phases and their compositions can be extracted with PrincipalComponent Analysis (PCA) and K-Means clustering algorithms. Finally, we discusshow one can reverse engineer the interaction parameters and volume fractions ofcomponents in order to achieve a range of desired packing structures, such asnested ‘Russian dolls’ and encapsulated ‘Janus’ droplets.
報(bào)告人簡介:
毛晟博士2007年于北京大學(xué)工學(xué)院理論與應(yīng)用力學(xué)專業(yè)畢業(yè)；2016年于賓夕法尼亞大學(xué)機(jī)械工程與應(yīng)用力學(xué)系取得博士學(xué)位；2016年9月至今任普林斯頓大學(xué)機(jī)械工程與航空航天系博士后研究員。科研方向包括固體力學(xué)、生物力學(xué)及軟物質(zhì)力學(xué)。
