Coupled Analysis of Flow and Stress in a Pipe Using COMSOL
Explore a tutorial model analyzing flow and stress in a pipe with a bend using COMSOL. Discover the pressure distribution, stress in pipe walls, displacement components, bending moments, and shear forces along the pipe. Gain insights into the fluid dynamics and structural behavior in this comprehensive study.
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Presentation Transcript
Coupled Analysis of Flow and Stress in a Pipe COMSOL
Introduction In this tutorial model, the flow in a pipe with a bend is computed using the Pipe Flow interface The computed fluid load is used as input to a stress analysis in the Pipe Mechanics interface Gravity loads from the pipe and fluid are also taken into account
Model Definition A circular pipe with outer diameter do = 10 cm consists of two straight 8 m long sections that are connected by a smooth 90 degree circular bend with a radius rb = 2 m; see the figure Geometry 1
Model Definition Pipe Flow
Model Definition Pipe Mechanics
Model Definition Pipe Mechanics
Model Definition Pipe Mechanics
Results The figure shows the pressure distribution inside the pipe The flow has a uniform velocity around 23.8 m/s along the whole pipe, which corresponds to the Reynolds number Re = 2.2 106 that indicates that the flow regime is highly turbulent Pressure distribution
Results The figure shows the stress distribution in the pipe walls Due to the pressure drop in the fluid, the value is higher at the inlet than at the outlet The pipe displacement von Mises stress distribution along the deformed pipe.The deformation is scaled by approximately a factor of 150
Results The figure shows the pipe displacement components The importance of the vertical supports is clearly visible Pipe displacement
Results The figure shows the bending moments and shear forces along the pipe Shear force
Results The figure shows the different contributions to the total stress state Stress contributions
Results As is common in piping systems, the hoop stress caused by the internal pressure is dominant Stress contributions
