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  • Wall Shear Stress Measurements in Two-Phase Flow using PIV, an Optical Sensor, and Wall Pressure Transducer (.pdf)
    the boundary layer. The wall shear stress in the channel was measured by means of three independent methods: measurement of the pressure gradient by an accurate differential pressure transducer, Particle Image Velocimetry (PIV), and an optical wall shear stress sensor. The three methods showed
  • Differential Effects of Orbital and Laminar Shear Stress on Endothelial Cells (.pdf)
    Laminar shear stress is atheroprotective for endothelial cells (ECs), whereas nonlaminar, disturbed, or oscillatory shear stress correlates with development of atherosclerosis and neointimal hyperplasia. The effects of orbital and laminar shear stress on EC morphology, proliferation, and apoptosis
  • A Cure for Hammer Rash: Measuring Powder Flowability with Shear Cell Testing
    and con-. hammering. Another approach is to create a hole in the. tainers requires a detailed understanding of your. hopper wall, as shown in Figure 1b, so a pole or rod can be. powder’s flow characteristics. This article explains. inserted to dislodge the powder buildup, but this often. how a shear
  • Measurement of Continuous Surface Shear Stress Vector Distributions (.pdf)
    values were not measured; rather,. parametric values of relative surface shear stress magnitude 1 ≤ τ/τr ≤ 8 were employed. A fiber optic probe at αP = 30 deg was used to capture light scattered from a point on the. centerline of the wall jet flow. The effective sampling diameter of this sensor
  • Medical Device Link . High-Speed Injection Molding of Thin-Wall Polycarbonate Tubes
    is dramatically affected by shear rates.1,2 As stated in one report, "The combination of injection speed and gate size allowed us to achieve the desired span of shear rates."1 Initial Thin-Wall Cannula Molding. A new cannula design mandated that the wall thickness of the tube be reduced to 0.63 mm
  • Thermal Imaging Scan Reveals the Truth Behind the Wall
    of the structure, an infrared scan always proves beneficial, providing fast detection for fast action. During a framing walkthrough with home builder, it was noticed that the design of the building had shear paneling installed on the interior portion of the wall in the master bedroom (Figure 1
  • Plastics Consultancy Network - Gates and runners
    clearance between the flight lands and the barrel wall. This is filled with a thin film of the polymer melt. High screw RPM will destroy the film by shear alone. This degraded material will then gradually mix into the main stream of the melt and be injected into the mould. Certain aspects of screw
  • Rotor Stator Mixer Design Shifts Into High Gear
    A new mixer design has recently pushed high-energy, high-shear rotor/stator mixing into new territory. With an innovative rotor/stator generator developed in the Ross Test Development Center, the new mixer is capable of ultra-high shear mixing, dispersion, emulsification, homogenization
  • High Speed Shearing of Stanless Steel Tube (.pdf)
    1.66mm wall. JANUARY/FEBRUARY 2003. 93. The tooling has been designed to accommodate the ‘quick change. Optimizing the Shear Cut Cycle. mill’ principles and can be changed in approximately 10-15 minutes. The shear cutting cycle of stainless steel is greatly improved with the. The shear cutting
  • Medical Device Link .
    extrusion processors to run at higher rates and with fewer screen changes,” said Peter M. Galland, the firm’s market manager for regulated products. “Injection molders have greater assurance that vinyl will stand up to the shear forces developed when filling molds for complex or thin-wall parts

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