A computational and experimental study is reported of turbulent flow around a square-sectioned U-bend with a mean bend radius equal to 3.375 times the hydraulic diameter (DH): the duct Reynolds number is 58,000. The bend geometry is the same as that for which Chang et al. (1983) have reported extensive LDA data except that in the latter experiment the bend was preceded by some thirty hydraulic ...

Today in many industries there is a need to pump electrically conductive fluids. In contrast classical hydrodynamics, MHD modeling requires the simultaneous solution of equations hydrodynamics and electrodynamics, which significantly complicates process. For fluids, such number experimental studies has not yet been conducted, addition, dependencies are complicated by influence magnetic field ta...

Canine elbow dysplasia is a complex of diseases that includes ununited anconeal process, fragmented medial coronoid process, osteochondrosis of the medial humeral condyle, and elbow incongruity. Three causes of elbow dysplasia have been proposed: osteochondrosis, trochlear notch dysplasia, and asynchronous growth of the radius and ulna. Genetics, nutritional imbalance, growth disturbances, and ...

A kinematic study was performed to examine the influence of elbow position on the range of supination and pronation of the forearm. The ranges of supination and pronation were measured in 50 volunteers (25 men and 25 women) using a custom-designed jig which constrained unwanted and confounding movements of the limb. Measurements were taken with the elbow in full extension, 45 degrees flexion, 9...

Many nuclear power plants report high cycle thermal fatigue in their cooling system, caused by temperature fluctuation in a non-isothermal mixing area. One of these areas is the T-junction, in which fluids of various temperatures and velocities blend. The objective of this research is to classify turbulent jet mechanics in order to examine the flow-field structure under various operating condit...

Background For decades, tuberculosis (TB) has posed a great threat to people worldwide. Bone and joint TB is one of the most common types of extrapulmonary TB, with elbow TB comprising a small proportion of these cases. The treatment for elbow stiffness associated with TB has been rarely reported. Patients and methods We retrospectively analyzed six patients (four females and two males) with ...

PURPOSE We investigated the best position for shoulder retractor strengthening exercise to maximize middle trapezius activity and minimize rhomboid major activity. Although both trapezius and rhomboids are scapular retractors, rhomboids also act as downward rotators of the scapula, which can worsen subacromial impingement. METHODS Twelve healthy participants (age 30 [SD 6] y) with no history ...

Different flow-altering methods, such as W−Weirs, have been developed to reduce erosion. For this study, we performed two experiments: (1) installing a W−Weir in various positions determine the best angle for placement, and (2) investigating variation of flow patterns bed shear stress distribution 90-degree sharp bend by measuring 3D components velocities, with without where greatest scour dept...