مقالههای M.M. Heydari*
توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقالههای نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده میشوند.
۱Viscoelasticity eff ects on hydrodynamic characteristics of electrokinetically driven flow in rectangular microchannels
نویسنده(ها): M.M. Heydari*
اطلاعات انتشار: Scientia Iranica، بيست و دوم،شماره۵، ۲۰۱۵، سال ۰
تعداد صفحات: ۱۱
The biomicro fluidic devices utilizing electroosmosis for flow actuation are usually encountered with non–Newtonian behavior of working uids. Hence, studying the flow of non–Newtonian fluids under an electroosmotic body force is of high importance for accurate design and active control of these devices. In this paper, mixed electroosmotically and pressure driven flow of two viscoelastic uids, namely PTT and FENE–P models, through a rectangular microchannel is examined. The governing equations in dimensionless form are numerically solved through a fi nite di erence procedure for a non–uniform grid. It is observed that although the Debye–Huckel linearization fails to predict the velocity pro le for viscoelasticuids, this approximation holds even at high zeta potentials, provided the velocity field is normalized with the mean velocity. It is also revealed that the dependency of the mean velocity on the level of elasticity in the fluid is linear. This functionality results in a Poiseuille number independent of the level of elasticity in the fluid. Moreover, the pressure e ects are pronounced for higher values of the channel aspect ratio. In addition, both the mean velocity and the Poiseuille number are increasing functions of the channel aspect ratio.
نمایش نتایج ۱ تا ۱ از میان ۱ نتیجه