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Title: CFD Simulation Of Three Double-Elbow Pipe Flows
Author: Cheng-Tsair Yang, Jian-Yuan Chen, Jiunn-Haur Shaw
Source: 2002 International Symposium on Fluid Flow Measurement
Year Published: 2002
Abstract: Flow structures are essential information in studying flowmeter installation effects. Experiments by LDV and PIV are frequently adopted to measure velocity profiles. Nevertheless, the measurements by use of those sophisticated facilities consume too much resource and time. Computational fluid dynamics (CFD) provides an alternative of investigating pipe flow structure and its influences on flowmeter performance. After testifying the reliability of the CFD scheme, we simulated the flows in three piping configurations--a U-type in-plane pipeline, an S-type in-plane pipeline, and a 90 out-of-plane pipeline. Flow fields with an Etoile flow straightener were also simulated subsequently. The simulated flow fields agreed well with the measured data by LDV, indicating the applicability of the two codes. By comparing the flows to those with and without an Etoile flow straightener, we concluded that the straightener suppressed the swirl effectively but postponed the flow to a fully developed condition as described by many experiments from different laboratories.

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