Fe3O4 nanofluid fully developed forced convection inside a copper tube is empirically investigated under the effect of a magnetic field. All of the investigations are performed under laminar flow regime (670≤Re≤1700) and thermal boundary conditions of the tube with uniform thermal flux. The tube is under the effect of a magnetic field in certain points. This research aims to study the effect of...

prediction of fluid-elastic instability is a great matter of importance in designing cross-flow tube bundles from the perspective of vibration. in the present paper, the threshold of fluid-elastic instability has been numerically predicted via simulation of incompressible, unsteady, and turbulent cross-flow through a tube bundle in a normal triangular arrangement. the conditions of simulation i...

Raman studies on double-wall carbon nanotubes (DWCNTs) obtained from peapods showed that the radial breathing mode (RBM) response of the inner tubes is split into more components than there are geometrically possible inner tubes. This was attributed to the possibility that one inner tube type may form in more than one outer tube type. Recent resonance Raman investigations revealed an even more ...

Isolated tube feet of Strongylocentrotus franciscanus contract briefly when the outer epithelium is touched. Similar twitch-like contractions can be induced by electrical stimulation of the outer surface of the tube foot. These responses appear to be chemically mediated. The following evidence indicates that the transmitter substance may be acetylcholine (ACh): ACh causes muscle contraction. Th...

Renal medullary blood flow was well maintained for several hours after blood loss which produced hypotension. Renal cortical blood flow was altered by trauma and mild hemorrhage even though blood pressure remained normal; rate of blood flow through the subcapsular, peritubular capillaries decreased to the level of that in the outer medulla. With further hemorrhage and the development of hypoten...

Figure 1: Left: three dimensional scheme of the phantom used for MRI experiments. Center tube is filled with PHIP substance (orange), outer tube contains water (blue). Right: the FIDs originating from the whole phantom. The blue signal stems from thermally polarized water and thermally polarized PHIP substanc. The red signal is generated by thermally polarized water and hyperpolarized PHIP subs...

Evidence for modified electronic structure in double-walled carbon nanotubes with respect to their individual inner and outer constituent single-walled nanotubes is provided by scanning tunneling microscopy and spectroscopy experiments. The contribution originating from the inner tube to the local density of states of the double-walled system was identified in agreement with previous theoretica...

The mechanism of blast damage to steel-clad concrete-filled steel tube (SCCFST) arched protective doors is studied using the dynamic response characteristics such loads under action shock wave loads, and ultimate load-bearing capacity formula derived based on “plastic hinge” mode limit analysis, which explores effect wave. design parameters each component door subjected waves discussed. Results...

The aim of this work was to study the relationship between capillary tube flow and the acoustic behavior of household refrigerators by investigating a particular type of fluid-induced noise, known as fluctuating noise. To this end a household refrigerator was carefully instrumented and firstly tested in a reverberant chamber and secondly in a climate-controlled chamber. Acceleration measurement...

A novel fluid power actuator called Flat Ring Tube (FRT) is introduced in this paper. The mechanism of FRT is so simple that it only needs a urethane flat tube and water pressure power source. No valves or switches are required. Applying constant water pressure results in periodic oscillation of the tube. The frequency is proportional to the flow rate of water and inversely proportional to the ...