Laminar-turbulent breakdown in a swept-wing boundary layer is typically caused by secondary instabilities of steady crossflow vortices (CFVs). So far, boundary-layer suction for laminar flow control in three-dimensional boundary layers has been applied to reduce the crossflow and thus the growth of the primary vortices only. We investigate the influence of strong, localized suction (pinpoint su...

The e!ect of air viscosity on suction force of vacuum pumps for holding micro-components was investigated. The experimental data show that suction force micro-components is much larger than the calculated results without considering in#uence of the lower pressure between the suction plate and the micro-component. According to the dimensional analysis, a theoretical formula of suction force was ...

The self similar steady boundary layer flow induced by a permeable continuous surface stretching with velocity Uw (X) = A. x −1/2 in a quiescent incompressible fluid in the presence of a transverse magnetic field of uniform strength Bo, with suction velocity Vw(x) = − ( υA 4 ) 1/2 . xfw is considered. Numerical solution of the resulting similarity momentum equation using Runge-Kutta-Fehlberg Fo...

The problem of steady Marangoni boundary layer flow and heat transfer in a nanofluid when the wall is permeable, namely there is a suction or injection effect, is studied using different types of nanoparticles. The mathematical problem reduces to a pair of coupled ordinary differential equations by similarity transformation, which is then solved numerically using the shooting method. Three diff...

We have developed an in vivo transfection method for naked plasmid DNA (pDNA) and siRNA in mice by using a tissue suction device. The target tissue was suctioned by a device made of polydimethylsiloxane (PDMS) following the intravenous injection of naked pDNA or siRNA. Transfection of pDNA encoding luciferase was achieved by the suction of the kidney, liver, spleen, and heart, but not the duode...

In this paper we propose a new method for displaying touch sensation by controlling suction pressure. We discovered a tactile illusion that pulling skin through a hole with suction pressure causes a feeling as if a stick is pushing the skin. This illusion is considered to be caused by the insensitivity of our mechanoreceptors to signs of stress (negative or positive) that are sensitive to the s...

Based on the experimental work of a refrigerator compressor with soft suction structures, the new soft suction structures were put forward. The performance of the compressor and the frequency properties of noise were also studied by means of tests. The results showed that these structures could reduce the noise of compressor. The main experiments included refrigeration capacity, COP, vibration,...

In this paper, the problem of heat and mass transfer on the flow of non-Newtonian micropolar fluid with uniform suction/blowing, heat generation, radiation, thermophoresis and chemical reaction is presented and discussed. The Homotopy Analysis Method (HAM) is employed to compute an approximation to the solution of the system of nonlinear differential equations governing the problem. The effects...

aims: endotracheal suctioning is a vital process to keep the airways open. the method of performing endotracheal suctioning has a great effect on its complications and effectiveness. this study was carried out with the aim of assessing gap between the knowledge and performance of nurses' working in intensive care units (icu) in tracheal suctioning.   methods: in this cross sectional study,...

An investigation is performed to study the effect of suction/injection on unsteady hydromagnetic natural convection flow of viscous reactive fluid between two vertical porous plates in the presence of thermal diffusion. The partial differential equations governing the flow have been solved numerically using semi-implicit finite-difference scheme. For steady case, analytical solutions have been ...