Interfacial instabilities in thin stratified viscous fluids under microgravity

2000 ◽  
Vol 26 (3) ◽  
pp. 203-217 ◽  
Author(s):  
Sang W Joo ◽  
Kwang-Chung Hsieh
Keyword(s):  
Viscous Fluids ◽  
Interfacial Instabilities

On the Numerical Prediction of Interfacial Instabilities in Shear Flows (Keynote)

2007 ◽  
Author(s):  
Robert Nourgaliev ◽  
Meng-Sing Liou ◽  
Theo Theofanous
Keyword(s):  
State Of The Art ◽  
Numerical Prediction ◽  
Viscous Fluids ◽  
Convergence Properties ◽  
Interfacial Instabilities ◽  
Diffuse Interfaces ◽  
Sharp Interfaces ◽  
Interface Treatment ◽  
Layered Flows ◽  
Resolution Requirements

We assess the state of the art in numerical prediction of interfacial instabilities due to shear in layered flows of viscous fluids. Basic ingredients of this assessment include linear stability analysis results for both miscible (diffuse) and immiscible (sharp) interfaces, the physics and resolution requirements of the critical layer, and convergence properties of the relevant numerical schemes. Behaviors of physically and numerically diffuse interfaces are contrasted and the case for a sharp interface treatment for reliable predictions of this class of flows is made.

Experimental Investigation of the Development of Interfacial Instabilities in Two Layer Coextrusion Dies

2004 ◽  
Vol 19 (2) ◽  
pp. 118-128 ◽  
Author(s):  
R. Valette ◽  
P. Laure ◽  
Y. Demay ◽  
J.-F. Agassant
Keyword(s):  
Experimental Investigation ◽  
Interfacial Instabilities

Kelvin–Helmholtz creeping flow at the interface between two viscous fluids

2015 ◽  
Vol 55 ◽  
pp. 317
Author(s):  
Lawrence Forbes ◽  
Rhys Paul ◽  
Michael Chen ◽  
David Horsley
Keyword(s):  
Creeping Flow ◽  
Viscous Fluids

scholarly journals A new upper bound for the largest growth rate of linear Rayleigh–Taylor instability

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Changsheng Dou ◽  
Jialiang Wang ◽  
Weiwei Wang
Keyword(s):  
Surface Tension ◽  
Growth Rate ◽  
Upper Bound ◽  
Viscous Fluids ◽  
Instability Condition ◽  
Interface Surface ◽  
Incompressible Viscous Fluids ◽  
Rayleigh Taylor Instability ◽  
Surface Tensor ◽  
Rt Instability

AbstractWe investigate the effect of (interface) surface tensor on the linear Rayleigh–Taylor (RT) instability in stratified incompressible viscous fluids. The existence of linear RT instability solutions with largest growth rate Λ is proved under the instability condition (i.e., the surface tension coefficient ϑ is less than a threshold $\vartheta _{\mathrm{c}}$ ϑ c ) by the modified variational method of PDEs. Moreover, we find a new upper bound for Λ. In particular, we directly observe from the upper bound that Λ decreasingly converges to zero as ϑ goes from zero to the threshold $\vartheta _{\mathrm{c}}$ ϑ c .

Study of kneading pressure and power consumption in a twin-blade planetary mixer for mixing highly viscous fluids

2021 ◽  
pp. 116723
Author(s):  
Jiecai Long ◽  
Yu He ◽  
Xiaobin Zhan ◽  
Zhibin Sun ◽  
Baojun Shen ◽  
...  
Keyword(s):  
Power Consumption ◽  
Viscous Fluids
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