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A velocimetry interferometer has been used to record the material velocity at the back surface of the samples.
An important feature of this model is the utilization of a nine-noded Lagrangian interpolation for the computation of surface characteristics and material velocity.
However, for high-speed webs this approach is insufficient, because it neglects the coupling between the total material velocity and the deformation experienced by the material.
The material velocity vector at any node can be obtained by the potential of adjacent nodes with an appropriate weighted method.
The key challenge in the development of profile extrusion dies is to design the transition region between outflow and inflow of the die in such a way that the material velocity at the outflow is homogeneous.
No directional splitting is used; upwinding is in the direction of the material velocity, and thus we define and use a new multidimensional limited gradient that generalizes Van Leer's MUSCL limiting [7].
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This technique yields the velocity profiles of flowing granular materials, velocity magnitude contours, vector fields, velocity distributions on certain levels in the model and traces of the selected particles.
The simulation result of the initial design shows that the material flow velocity in the bearing exit is non-uniform.
The imaging revealed a variety of bubble sizes and shapes depending on the material and velocity.
Both the experimental and simulated results show that superimposing ultrasonic vibration on FSW increases the material flow velocity and strain rate; enlarges the flow region and deformation region.
The effects of bed material, operation velocity, and bed structure on the solid circulating rate were tested at a small-scale test facility.
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