Extension of One-Dimensional Boundary Conditions for Junction to Those for Other Pipe Elements 961821

In order to unify the boundary conditions for various pipe elements and to simplify the computer code, the one-dimensional boundary conditions for three-way junction are extended to those for some pipe elements such as a nozzle and an elbow. To examine whether the extended boundary conditions are useful or not, the pulsatile flow through the pipe with the nozzle or elbow are numerically simulated using a Random-Choice Method and then the results are compared with those by the experiments. As a result, good agreement was found between experiments and calculations as long as the pressure histories are concerned and the extension of the boundary conditions is found to be valuable.


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