Electro-osmotic and Pressure-Driven Flow in an Eccentric Microannulus
Küçük Resim Yok
Tarih
2019
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Walter De Gruyter Gmbh
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Consideration is given to steady, fully developed mixed electro-osmotic/pressure-driven flow of Newtonian fluid in an eccentric microannulus. The governing Poisson-Boltzmann and momentum equations are solved numerically in bipolar coordinates. It is shown that for a fixed aspect ratio, fully eccentric channels sustain the maximum average viscosity (i.e. flow rate) under the same dimensionless pressure gradient and electro kinetic radius. For the Debye-Huckel approximation (linearised Poisson-Boltzmann equation), we show that closed-form analytical solution can be derived for velocity field. Finally, the effect of the electrokinetic radius, pressure gradient, and eccentricity on the flow field was investigated in detail.
Açıklama
Anahtar Kelimeler
Bipolar Coordinates, Debye-Huckel Approximation, Eccentric Microannulus, Electro-osmotic Flow, Finite Difference Method, Poisson-Boltzmann Equation
Kaynak
Zeitschrift Fur Naturforschung Section A-A Journal of Physical Sciences
WoS Q Değeri
Q3
Scopus Q Değeri
Q3
Cilt
74
Sayı
6
