A straight cylindrical pipe was chosen as the flow domain (see Fig.1.). Faces A, B and C represent the inlet, wall and outlet respectively.
Analysis type and Domain
A uniformly-spaced hexahedral mesh was generated on the SimScale platform using the snappyHexMesh tool (see Fig.2.). It was observed that the presence of inflation layer doesn’t not significantly improve the solution.
Tool Type : OPENFOAM®
Analysis Type : Incompressible Steady-state (Laminar)
Mesh and Element types :
Cells in x
Cells in y
Cells in z
Number of nodes
Water: Dynamic viscosity (ν
Fixed Value: 0.1ms−1
Fixed Value: 0.0ms−1
Fixed Value: 0.1Pa
The analytical solution gives us the following equations for maximum axial velocity, pressure drop and developed radial velocity profile:
A comparison of the velocity and pressure drop obtained with SimScale with analytical results is given in Fig.3A, 3B and 3C. Fig.3A shows the developed radial velocity profile, located 60 cm from the inlet. The variation of the axial velocity along the center-line is shown in Fig.3B, and the pressure drop along the pipe can be observed in Fig.3C.
Fig.3. Visualization of Axial velocity and pressure (A, B) and developed radial velocity profile (C)
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Last updated: November 25th, 2019
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