A lattice Boltzmann method for axisymmetric multiphase flows is presented and validated. The method is capable of accurately modeling flows with variable density. We develop the classic Shan-Chen multiphase model [Phys. Rev. E 47, 1815 (1993)] for axisymmetric flows. The model can be used to efficiently simulate single and multiphase flows. The convergence to the axisymmetric Navier-Stokes equa...

Reactive hyperemia was studied in cat sartorius muscle by measurement of venous outflow and capillary red cell velocity following occlusions of 5-120 s. The peak value for volume flow rose in a graded manner as occlusion duration increased, reaching a level of 280% above control following 120 s of occlusion. By contrast, peak values for capillary flow were 200% above control even after short (1...

INTRODUCTION To assess differences in associations of ocular perfusion pressure (OPP) as well as retinal and retrobulbar blood flow between men and women with primary open angle glaucoma (OAG). METHODS A total of 116 patients with OAG (age 66.9 ± 10.9 years, 70 females) participating in the Indianapolis Glaucoma Progression Study were assessed for OPP, retinal microcirculation, and retrobulba...

capillary electrophoresis (ce) with indirect uv detection is an interesting analytical method for the analysis of drugs and pharmaceuticals. good and reproducible capillary quality is needed to develop robust methods and to facilitate method transfer in ce. it is widely accepted that preconditioning procedures are indispensable in capillary electrophoresis in order to achieve reproducibility of...

An open capillary channel is a structure that establishes a liquid flow path when the capillary pressure caused by surface tension forces dominates in comparison to the hydrostatic pressure induced by gravitational or residual accelerations. To maintain a steady flow through the channel the capillary pressure of the free surface has to balance the pressure difference between the liquid and the ...

Interference is studied for the determination of glutathione (GSH) in human red blood cells by using capillary zone electrophoresis with end-column amperometric detection at a gold-mercury amalgam microelectrode. It is found that when interference substances such as hemoglobin (Hb) in the hemolysate flow off from the end of the separation capillary, they can be adsorbed on the surface of the el...

This note presents a simple method to control the speed of the autonomous capillary flow using an array of hydrophobic patterns. The microfluidic system in this note was composed of two planar parallel plates that were separated by spacers. The bottom plate had a hydrophilic microchannel which was surrounded by hydrophobic tracks. The top surface was relatively hydrophobic compared to the botto...

Pulmonary capillary blood flow was measured by the nitrous oxide-body plethysmograph technique in 21 patients with valvular heart disease or pulmonary thromboembolism during routine diagnostic cardiac catheterization. The studies were performed with a high-frequency phonocardiogram recorded from the pulmonary area to indicate the pulmonary valve opening at the beginning of right ventricular eje...

Background and objective: Vascular obstruction and impaired blood flow and oxygen delivery cause a myocardial infarction and limit a personchr('39')s function. Therefore, finding a way to create new arteries and replace blocked arteries has always been of interest to researchers, including exercise physiologists. Therefore, this study was conducted to evaluate the effect of eight weeks of moder...

The hydrodynamic problem of electroosmotic flow in a cylindrical capillary with random zeta potential is solved in the limit of small Deybe length and low Reynolds number. Averages are defined over multiple experiments and the mean axial velocity is found to be a plug flow. The variance of the velocity exhibits parabolic-like variation across the capillary. Average concentrations of samples tra...