investigation the 3d mixing with non-homogenous surface charges using helmholtz-smoluchowski model

نویسندگان

جعفر جماعتی

حمید نیازمند

سیدعلی میربزرگی

چکیده

numerical investigation of 3d electrokinetic mixing through micromixer has performed both qualitatively and quantitatively. in order to reduce numerical expenses of 3d flows, we implement the helmholtz-smoluchowski method for the numerical modeling of electroosmotic flows. according to the previous study of electrokinetic mixing inside the heterogeneous microchannels, existence of the vortexes within the flow field always increase the mixing performance for 2d flows. however, investigations of 3d micromixers show that this increase does not happen for all the situations and in some cases, existence of the vortexes does not enhance the mixing performance. findings of this research indicate that the asymmetry degree of the flow field pattern is the key parameter for the mixing performance. within the 3d flow field, there are more opportunities to increase the asymmetries. consequently, mixing performances of the 3d flows are much larger compared to those of 2d flows. studies of various 3d cases for electroosmotic micromixer show that mixing performance can be improved or deteriorated depending on the arrangement of the heterogeneities over the microchannel walls. these results confirmed that 2d simulation of mixing could not explain the complete benefits of passive micromixers. these results can apply to the simulation of micromixers used in lab-on-a-chip devises.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Investigation of electrokinetic mixing in 3D non-homogenous microchannels

A numerical study of 3D electrokinetic flows through micromixers was performed. The micromixers considered here consisted of heterogeneous rectangular microchannels with prescribed patterns of zeta-potential at their walls. Numerical simulation of electroosmotic flows within heterogeneous channels requires solution of the Navier-Stokes, Ernest-Plank and species concentration equations. It is kn...

متن کامل

investigation of electrokinetic mixing in 3d non-homogenous microchannels

a numerical study of 3d electrokinetic flows through micromixers was performed. the micromixers considered here consisted of heterogeneous rectangular microchannels with prescribed patterns of zeta-potential at their walls. numerical simulation of electroosmotic flows within heterogeneous channels requires solution of the navier-stokes, ernest-plank and species concentration equations. it is kn...

متن کامل

the use of appropriate madm model for ranking the vendors of mci equipments using fuzzy approach

abstract nowadays, the science of decision making has been paid to more attention due to the complexity of the problems of suppliers selection. as known, one of the efficient tools in economic and human resources development is the extension of communication networks in developing countries. so, the proper selection of suppliers of tc equipments is of concern very much. in this study, a ...

15 صفحه اول

Investigation of Directional Filter on Kube-Pentland’s 3D Surface Reflectance Model using Photometric Stereo

This paper uses theory, simulation and laboratory experiment to investigate the directional filter on Kube and Pentland’s linear reflectance model which presents the image directionality as a product of the illuminant direction and surface directionality. As a result, a surface rotation is not equivalent to an image rotation if the illuminant is not rotated. It can be seen that the directional ...

متن کامل

the effect of using model essays on the develpment of writing proficiency of iranina pre-intermediate efl learners

abstract the present study was conducted to investigate the effect of using model essays on the development of writing proficiency of iranian pre-intermediate efl learners. to fulfill the purpose of the study, 55 pre- intermediate learners of parsa language institute were chosen by means of administering proficiency test. based on the results of the pretest, two matched groups, one as the expe...

Investigation of stereo-based 3D surface reconstruction

This article presents an investigation study of stereo-based 3D surface reconstruction algorithms by providing an overview of the diierent approaches that have been investigated in the stereo literature during the last decade. This study considers only the two-views plain stereo algorithms and provides another classiication for the stereo approaches based on the features used in the stereo lite...

متن کامل

منابع من

با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید


عنوان ژورنال:
علوم کاربردی و محاسباتی در مکانیک

جلد ۲۴، شماره ۱، صفحات ۱۶-۰

کلمات کلیدی

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023