Drag Coefficients of Irregularly Shaped Particles in Newtonian Fluids

Separation of particles in non-Newtonian fluids flowing in T-shaped microchannels

Background The flow of suspensions through channel bifurcations is a relevant topic in several applications such as microfluidics and biology. Indeed, a number of microfluidic devices consisting of a main channel with several side branches, aimed at separating particles with different size, has been proposed [1–4]. From the biological side, the microcirculatory network is made of many capillary...

Time-periodic Electroosmotic Flow of Non-newtonian Fluids in Microchannels

The alternating current electroosmotic flow of a non-Newtonian power-law fluid is studied in a circular microchannel. A numerical method is employed to solve the non-linear Poisson-Boltzmann and the momentum equations. The main parameters which affect the flow field are the flow behavior index, the dimensionless zeta potential and the dimensionless frequency. At very low dimensionless frequenci...

Coordinate Systems for Modeling the Hydrodynamic Resistance and Diffusion Coefficients of Irregularly Shaped Rigid Macromolecules

The analysis of the deterministic motion of a rigid molecule through a quiescent viscous liquid is properly carried out with the origin of coordinates at the center of reaction (CR). In treating the stochastic motions of the diffusion of this same body, however, the center of diffusion (CD) is the appropriate origin. For an irregularly shaped macromolecule, the CR and CD generally do not coinci...

Analysis of Irregularly Shaped Texture Regions

Four different texture classification methods (wavelet-based, co-occurrence matrices-based, 1D-histograms-based, and 1D Boolean model-based) are systematically compared and evaluated with respect to their performance in identifying textures from small and irregular samples. Two sets of 135 complex shape masks (symmetric and nonsymmetric) are created using Fourier shape descriptors, and used to ...

Non-newtonian Fluids