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MHD micropumping of viscoelastic fluids: an analytical solution
Springer Science and Business Media LLC - Tập 33 - Trang 93-104 - 2021
Saied Moghaddam
An analytical solution is found for examining the effect of a fluid’s elasticity on the performance of MHD micropumps. The test fluid is assumed to be an incompressible viscoelastic fluid obeying the Oldroyd-B model. The flow generated by the Lorentz force is assumed to be laminar, unidirectional, and two-dimensional. The effects of relaxation and retardation times are investigated on the volumetr...... hiện toàn bộ
Yield shear stress and disaggregating shear stress of human blood
Springer Science and Business Media LLC - Tập 26 - Trang 191-198 - 2014
Jinmu Jung, Byoung-Kwon Lee, Sehyun Shin
This review presents two distinct rheological parameters of blood that have the potential to indicate blood circulation adequacy: yield shear stress (YSS) and disaggregating shear stress (DSS). YSS and DSS reflect the strength of red blood cell (RBC) aggregation in suspension under static and dynamic conditions, respectively. YSS, defined as the critical stress to disperse RBC aggregates under sta...... hiện toàn bộ
Rheological and electrical percolation behaviors of polyvinyl alcohol/silver nanowire suspensions using different aspect ratio silver nanowires
Springer Science and Business Media LLC - - Trang 1-10 - 2023
Si Yoon Kim, Kyu Hyun
The rheological and electrical properties of polyvinyl alcohol (PVA)/silver nanowire (AgNW) suspensions and films are investigated with increasing AgNW concentrations, employing AgNWs with two different aspect ratios, namely 714 and 1000 (referred to as Ag714 and Ag1000, respectively). To estimate the effect of the aspect ratio on the rheological and electrical percolation behavior, the linear rhe...... hiện toàn bộ
Flow patterns in 4:1 micro-contraction flows of viscoelastic fluids
Springer Science and Business Media LLC - Tập 27 - Trang 65-73 - 2015
Daewoong Lee, Kyung Hyun Ahn
In this paper, the flow pattern of viscoelastic fluids flowing inside a 4:1 planar contraction microchannel was investigated and quantitatively analyzed. A wide range of Weissenberg number flows of poly(ethylene oxide) solutions were observed while maintaining low Reynolds number (0.01 > Re). As the shear rate or fluid elasticity was increased, a transition from steady to unsteady flow was observe...... hiện toàn bộ
Relationship between rheology and electro-spinning performance of regenerated silk fibroin prepared using different degumming methods
Springer Science and Business Media LLC - Tập 26 - Trang 119-125 - 2014
Hyun Ju Kim, In Chul Um
Electro-spun silk fibroin (SF) has been studied for biomedical applications because of its good biocompatibility, cyto-compatibility, and simple fabrication method. SF is obtained by a degumming process and the degumming method can affect the degree of molecular degradation of SF during the degumming process. In the present study, the effect of the degumming method on the rheology and electro-spin...... hiện toàn bộ
Influence of cationic polymer on the floccule size of cement pastes containing polycarboxylate superplasticizer and Na-bentonite
Springer Science and Business Media LLC - Tập 35 Số 2 - Trang 105-116 - 2023
Pengpeng Wen, Feng Zhang, Baicun Zheng
Field-responsive smart composite particle suspension: materials and rheology
Springer Science and Business Media LLC - Tập 24 - Trang 147-153 - 2012
Wen Ling Zhang, Ying Dan Liu, Hyoung Jin Choi
Both electrorheological (ER) and magnetorheological (MR) fluids are known to be smart materials which can be rapidly and reversibly transformed from a fluid-like to a solid-like state within milliseconds by showing dramatic and tunable changes in their rheological properties under external electrical or magnetic field strength, respectively. Here, among various smart composite particles studied, r...... hiện toàn bộ
A nonlinear rheological model for the ultrasonically induced squeeze film effect in variable friction haptic displays
Springer Science and Business Media LLC - Tập 29 - Trang 219-228 - 2017
Kwon Joong Son
A squeeze film induced by ultrasonic vibration between two solid surfaces in contact can dramatically reduce the friction between them. This phenomenon, so-called the squeeze film effect, has been utilized in variable friction tactile displays for texture rendering purposes. Such tactile displays can provoke a haptic sensation to a finger pad in a controllable way. A real-time adjustment of the co...... hiện toàn bộ
Hydrodynamic focusing for micro-rheological single-particle study
Springer Science and Business Media LLC - - 2015
M. Dziubiński
Towards unraveling the sintering process of two polystyrene particles by numerical simulations
Springer Science and Business Media LLC - Tập 31 - Trang 285-295 - 2019
Caroline Balemans, Prakhyat Hejmady, Ruth Cardinaels, Patrick D. Anderson
In this work, we study different rheological and thermal phenomena present during laser sintering of two polystyrene (PS) particles using fully resolved numerical simulations. In our analysis, we varied the laser power, the initial temperature and the thermal convection coefficient, used different rheological descriptions for the flow behavior and in addition studied the effect of the substrate (u...... hiện toàn bộ
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