In this research, some more applicable ferrofluids are produced and their mechanical specifications are measured, experimentally. Also, their treatments in the ventilated cavity geometry are assessed numerically. The magnetite nanoparticles are produced by a chemical combination of Fe2+ and Fe3+ with NH3. In order to solve the nanoparticles in the new mediums, a...

A PIV study of the flow in a stationary model of a smooth two-pass internal coolant passage is presented, which focuses on the flow characteristics in the sharp 180o bend and downstream of the bend where the flow is redeveloping. Because PIV in its traditional conception only allows for the investigation of two-dimensional flow, a stereoscopic digital PIV system was assembled that measures all ...

The supplying of discoloured water is of significant concern to both consumers and water companies. A datadriven, primarily automatable method is presented for identifying the potential causes of large numbers of recorded discolouration events. The case is made for considering not just the temporal and spatio-planar separation of possible causes in a water distribution system (such as valve man...

The structural characteristics of membrane support directly affect the performance of carrier facilitated transport membrane. A highly porous PolyHIPE impregnated with Aliquat 336 is proposed for Cr(VI) separation. PolyHIPE consisting of poly(styrene-co-2-ethylhexyl acrylate) copolymer crosslinked with divinylbenzene has the pore structure characteristic of large pore spaces interconnected with...

In the present study, a decompression experiment involving two rotating concentric cylinders with hydraulic oil between clearances was performed. The dependency of occurrence condition gaseous cavitation in investigated not only based on rotation speed, which corresponds to shear strength flow, but also pressure history flow. As result, characteristics were found be divided into regions separat...

In this report, we describe an approach that integrates a mathematical speci cation language with more traditional software design techniques to yield a practicable methodology for the speci cation of safety-critical control systems. To manage complexity and to foster separation of concerns, the system design model is divided into three views: the architectural view, speci ed with object and cl...

We have converted nanoscale mechanical energy into electrical energy by means of piezoelectric zinc oxide nanowire (NW) arrays. The aligned NWs are deflected with a conductive atomic force microscope tip in contact mode. The coupling of piezoelectric and semiconducting properties in zinc oxide creates a strain field and charge separation across the NW as a result of its bending. The rectifying ...

Abstract Hydraulic fracturing experiments with low-viscosity fluids, such as supercritical CO2, demonstrate the formation of complex fracture networks spread throughout rocks. To study influence viscosity fluids on hydraulic propagation, a hydromechanical-coupled cohesive zone model is proposed for simulation mechanical response rock grains boundary separation. This methodology considers synerg...