This paper describes the application of the small boundary displacement model (SBDM) of fluid-structure coupling for predicting oscillatory fluid-elastic instability of a tongue-in-groove leakage joint. This coupling model extends structural small displacement theory to fluid-structure interfaces, eliminating the need for temporally changing meshes when structural motion is small compared with joint dimensions. The SBDM algorithm accurately predicts the onset of oscillatory instability for a tongue-in-groove leakage joint when compared with experimental data. Even though the methodology is specifically applied to a tongue-in-groove joint, the approach is equally suitable for evaluating the fluid-elastic stability of leakage joints in general.

Issue Section:
Technical Papers
Keywords:
flow instability, fluid dynamics, liquid structure, liquid theory
Topics:
Flow (Dynamics), Fluids, Stability, Leakage, Pressure drop, Pressure, Simulation
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Copyright © 2004
 by ASME
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