v4.25.100 TTLV100 - Thermal shock in a pipe with exchange condition

Summary:

This transient linear thermal test consists in imposing a cold thermal shock on a hollow cylinder that is assumed to be infinite using an exchange limit condition.

The shock is modelled by a linear ramp \(\Delta T=–269°C\) in \(12s\).

The problem is treated axisymmetrically and in 3D.

The reference solution is obtained on a fine mesh.

The test is carried out on 3 models: (TRIA3, QUAD4), (,), (TRIA6, QUAD9), (,) in AXIS_DIAG and (HEXA8, PENTA6) in 3D_ DIAG.

We test the transient linear thermal algorithm when the mass matrix is diagonalized (modeling AXIS_DIAG and 3D_ DIAG with «  » mass lumping »).

• 1. Reference problem
  • 1.1. Geometry
  • 1.2. Material properties
  • 1.3. Boundary conditions and loads
  • 1.4. Initial conditions
• 2. Benchmark solution
  • 2.1. Calculation method used for the reference solution
  • 2.2. Benchmark results
• 3. Modeling A
  • 3.1. Characteristics of modeling
  • 3.2. Characteristics of the mesh
  • 3.3. Tested sizes and results
• 4. B modeling
  • 4.1. Characteristics of modeling
  • 4.2. Characteristics of the mesh
  • 4.3. Tested sizes and results
• 5. C modeling
  • 5.1. Characteristics of modeling
  • 5.2. Characteristics of the mesh
  • 5.3. Tested sizes and results
• 6. Summary of results