The main purpose of this study is to perform numerical simulation of nanofluids as the coolant in VVER-440 fuel rod bundle. The fuel rod bundle contains 60 fuel rods with length of 960 mm and 4 spacer grids. In VVER-440 fuel rod bundle the coolant fluid (water) is in high pressure and temperature condition. In the present Thermo-hydraulic simulation, water-AL2O3 nanofluids containing various vo...

One of the important hurdles in horizontal well stimulation is the generation of hydraulic fractures (HFs) from all perforation clusters within a given stage despite the challenges posed by stress shadowing and reservoir variability. In this paper we use a newly-developed, fully coupled, parallel-planar 3D HF model to investigate the potential to minimize the negative impact of stress shadowing...

Water hydraulic fluid switching transmission (FST) has lower environmental load and lower energy loss in valves for using only ON/OFF valves. In addition, improvement of transmission efficiency can be expected by using accumulator as the second driving source and making use of waste energy by energy recovering action. This paper concerned with experimental results and a design of simulator of t...

An improved procedure for controlling the acidity ofphosphate esters is described. In the presence of water phosphate esters undergo hydrolysis which increases the acidity of the jluid and eventually lea& to fluid degradation. Currently this problem is addressed through the use of acid adsorbing andor neutralizing agents such as Fuller's earth or activated alumina. Bese agents neutralize the ac...

Murine models of osteoarthritis (OA) and post-traumatic OA have been widely used to study the development and progression of these diseases using genetically engineered mouse strains along with surgical or biochemical interventions. However, due to the small size and thickness of murine cartilage, the relationship between mechanical properties, molecular structure and cartilage composition has ...

The study of two-phase fluid flow behavior in hydraulic structures such as pressurized flow tunnels, culverts, sewer pipes, junctions and other similar conduits is of great importance. A two-phase mixture flowing in a pipe can exhibit several interfacial geometries such as bubbles, slugs or films, depending on the fluid and hydrodynamic properties of flow. The main variables, giving rise to a v...

Gas storage fields have numerous wells that are used for both injection during low demand periods and withdrawal during high demand periods. As these wells age, their deliverability declines due to several factors. Stimulation treatments (hydraulic fracturing of the formation) are routinely used in gas industry to improve gas well productivity. This study was conducted on a large natural gas st...

Flow in the open channels has great importance in the hydraulic engineering. Any disturbances as contractions and expansions affect the flow characteristics like velocities, flow rates and water surface profiles. Their effects on the flow must be considered during the design process of flow structures. In the last decades numerical solutions become popular as experimental studies take time, may...

Observations are given for the foehn event which occurred in the Abashiri-Ohmu area (N44.3, E143.5), Hokkaido, northern Japan, on 12 May 1975. A numerical investigation is made of the foehn, using a 2-dimensional nonhydrostatic model. The foehn is well simulated, even without any diabatic heating in the presence of an inversion layer below 900hPa. This foehn is confirmed to be dynamically induc...