2008•Pipeline Technique and EquipmentRequires access

Numerical Computations of the Flow and Hydraulic Loss Coefficient in a 90° Bend with a Square-cross-section

Y. Ren

Abstract

The bend is important pipe fitting in the chemical industry system,the hydraulic loss of which has an important effect on the design of the overall pipeline.By contrasting the calculated values of speed with the experimental value in different cross sections of the bend,the speed distribution inside of the bend and the calculation of coefficients with different Reynolds numbers by FLUENT software,the result is obtained that numerical simulations and experimental values have a certain compatibility.The length of inlet pipeline of the bend has an important impact on the form of flow.The coefficients of frictional resistance and of local resistance are connected with Reynolds number and increase with the decrease of the Reynolds unmber.

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Key concepts: Reynolds number, Inlet, Mechanics, Fluent, Computation, Computational fluid dynamics, Pipe flow, Mathematics