Hele heftet
نویسندگان
چکیده
منابع مشابه
Imperfect Hele - Shaw cells
2014 The covering surfaces of a Hele-Shaw cell may be roughened mechanically, or modified by random chemical patches which change the wetting properties. We discuss first the quasi-static injection of a single fluid (with a finite contact angle 03B8e) in an imperfect cell. The shape of the injected region depends critically on a dimensionless number i (ratio of the boundary energy 03C4 over the...
متن کاملSingularity Formation in Hele-Shaw Bubbles
We provide numerical and analytic evidence for the formation of a singu-larity driven only by surface tension in the mathematical model describing a two-dimensional Hele-Shaw cell with no air injection. Constantin and Pugh have proved that no such singularity is possible if the initial shape is close to a circle; thus we show that their result is not true in general. Our evidence takes the form...
متن کاملRotating hele-shaw cells with ferrofluids
We investigate the flow of two immiscible, viscous fluids in a rotating Hele-Shaw cell, when one of the fluids is a ferrofluid and an external magnetic field is applied. The interplay between centrifugal and magnetic forces in determining the instability of the fluid-fluid interface is analyzed. The linear stability analysis of the problem shows that a nonuniform, azimuthal magnetic field, appl...
متن کاملOn Hele-shaw Models with Surface Tension
It is shown that surface tension effects on the free boundary have a regularizing effect for Hele-Shaw models, which implies existence and uniqueness of classical solutions for general initial domains.
متن کاملSynchronization between two hele-shaw cells.
Complete synchronization between two Hele-Shaw cells is examined. The two dynamical systems are chaotic in time and spatially extended in two dimensions. It is shown that a large number of connectors are needed to achieve synchronization. In particular, we have studied how the number of connectors influences the dynamical regime that is set inside the Hele-Shaw cells.
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ژورنال
عنوان ژورنال: BARN - Forskning om barn og barndom i Norden
سال: 2020
ISSN: 2535-5449,0800-1669
DOI: 10.5324/barn.v32i1.3528