Numerical assessment of directional energy performance for 3D printed midsole structures.

Energy can be represented in the form of deformation obtained by the applied force. Energy transfer is defined in physics as the energy is moved from one place to another. To make the energy transfer functional, energy should be moved into the right direction.

Rotating polygonal depression soliton clusters on the inner surface of a liquid ring.

We report an experimental observation of rotating depression soliton sets on the inner surface of a viscous liquid ring, carrying background waves. These occur within a rotating shallow layer of oil inside a stationary cylindrical container. The solitons are organized either in single, two, or regular polygonal (triangle and hexagon) clusters; they travel in unison at a higher speed than the background traveling waves.

Optimization of drug viscosity used in gas-powered liquid jet injectors.

This paper describes the effect of drug viscosity on the performance of gas powered liquid jet injectors. The analysis is accomplished utilizing a Computational Fluid Dynamics (CFD) model that obtains the stagnation pressure at the nozzle outlet. The technique is based on previous work used to predict gas power driven injector piston velocity with time.

CFD analysis of unsteady flow through conjoining Aorta and aortic isthmus.

The initial stages of fetal development require that blood oxygenation occur through the placenta rather than the non functioning lungs. As a result the fetal circulatory system develops a temporary shunt between the aorta and pulmonary artery, known as the ductus arteriosis (DA). This study utilizes CFD techniques to analyze the flow behavior in the aortic isthmus neighboring the DA.

Experimental analysis of the performance of an air-powered needle-free liquid jet injector.

An experimental study was performed using a custom-built air-powered needle-free injector to investigate the various injector parameters governing the dynamics of jet injection. A parametric study using five different nozzle sizes at driver pressure ranging from 4 to 8 bar was carried out. The fluid stagnation pressure of the liquid jet was determined using a Honeywell force sensor.

Azimuthal solitary surface wave in cylindrical tank.

This Brief Report is devoted to the study of the solitary surface wave rotating in the azimuthal direction, arising during water drainage from a cylindrical reservoir, when shallow flow conditions are reached. The linear dependence between the wave speed and its amplitude is shown to be similar to that expected from the classical Korteweg-de Vries equation.

Symmetrization of a polygonal hollow-core vortex through beat-wave resonance.

We report on the symmetrization phenomenon of a hollow-core vortex in shallow liquid conditions. This phenomenon accompanies the transition of m wave into (m+1) wave and involves a beat-wave resonance that mediates energy transfer between the background flow and the vortex core. It is shown that this beat wave has a frequency m/(m-1)times the frequency of the parent m wave.