The origin of extensional flow in a channel with sudden contraction and expansion

31st International Conference on Equations of State for Matter

Kravchenko, I.V.^1 ; Patlazhan, S.A.^2 ; Muller, R.^3 ; Sultanov, V.G.^1

Institute of Problems of Chemical Physics of the Russian Academy of Sciences, Academician Semenov Avenue 1, Chernogolovka, Moscow Region

142432, Russia^1

Semenov Institute of Chemical Physics of the Russian Academy of Sciences, Kosygina 4, Moscow

119991, Russia^2

Charles Sadron Institute UPR 22 CNRS, 23 rue du Loess, Strasbourg

67034, France^3

关键词: Axial velocity;    D-channel;    Elongational flow;    Extensional flows;    Pressure-driven flows;    Sudden contraction;    Viscous incompressible fluids;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/774/1/012026/pdf
DOI  :  10.1088/1742-6596/774/1/012026

来源: IOP

【 摘 要 】

The pressure driven flow of a viscous incompressible fluid in a 2D channel with sudden contraction and expansion is investigated numerically. The attention is concentrated on studying conditions of occurrence of the elongational flow in a narrow section of the channel. To this end, interconnection between flow patterns and axial velocities is analyzed at different Reynolds numbers.