Viscous effect of wing in ground effect in wind tunnel test was investigated numerically. Ground settings in wind tunnel test were simulated by specifying different ground boundary conditions in CFD. It was revealed for fixed-ground based wind tunnel test that: boundary layer developed from the ground deforms effective ground surface and introduces a decreased effective ground clearance; a shar...

For the design of steel-lined pressure tunnels and shafts in anisotropic rock, it is common practice to assume for the computation that the system stands in isotropic medium with the lowest stiffness measured in situ. In this paper, stresses and displacements in the steel liner of a particular steel-lined pressure tunnel are numerically assessed taking into account the anisotropic behavior of t...

BACKGROUND This study quantified the effects of heat, cold, and pressure on the median nerve and transverse carpal ligament in subjects without carpal tunnel syndrome. MATERIAL AND METHODS Subjects were individuals ages 20-50 who had no symptoms of carpal tunnel disease. Imaging ultrasound was used to measure the clearance around the median nerve, transverse ligament elasticity, nerve conduct...

Tendency to build more slender and more flexible tall buildings have made these structures susceptible to action of wind. Therefore, wind force is one of the prime considerations in design of tall buildings. The prediction of wind-induced pressure coefficients on the surface of the buildings is of considerable practical importance. Wind tunnel testing is one of the main methods for wind load de...

Analysis of advanced displacement in construction progress of tunnel excavation with weak surrounding rock is carried out by numerical method and comparison of model test result. In allusion to the problems of regional landslides and extruded large-deformation seriously impacting the stability of rock mass in construction process of large-section tunnel with weak surrounding rock, the elastic-p...

There are several industrial methods for tunnel ventilation system design. In particular, for tunnels where axial flow fans are applicable, there are specialized computer programs that calculate the various pressure drops that consider wall friction and local losses due to signs and appurtenances, and considering vehicle emission factors based on up-hill or down-hill conditions, determine the n...

With the implementation of regional coordinated development strategy, traffic flow has grown explosively. The construction a larger tunnel section becomes an effective way to solve highway network’s insufficient transport capability problem. Currently, there is little research on factors influencing and methods calculating loose pressure in surrounding rock mass for tunnels with super-large cro...

The creep associated with unloading surrounding rock during the excavation of deep tunnels seriously affects stability tunnel, and a high seepage pressure will aggravate strength attenuation structural deterioration rock. Based on background excavation-induced deeply buried granite tunnel pressure, in this paper we carry out triaxial test that considers effects both disturbance pressure. We als...

The study of the aerodynamics related to the improvement in the acting of airplanes and automobiles with the objective of being reduced the effect of the attrition of the air on structures, providing larger speeds and smaller consumption of fuel. The application of the knowledge of the aerodynamics not more limits to the aeronautical and automobile industries. Therefore, this research aims to d...

Carpal tunnel syndrome (CTS) results from median nerve entrapment during increased intra-tunnel pressure that is often a product of swelling of the digital flexor tendon sheaths consequent to repetitive movements of the hand and wrist or by direct compression on the wrist. Individuals with CTS may experience pain, tingling, numbness and weakness in the palmar surface of the first three digits, ...