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FlexPDE 7
偏微分有限元素軟體
Finite Element Solution Environment
軟體代號:6278
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Features
 Adaptive Mesh Refinement

FlexPDE continually monitors the accuracy of the solution, and adapts the finite element mesh to resolve those areas of high error.

You don't need a dense mesh throughout the domain, because FlexPDE will find the areas that need it, and put it there!

The problem shown here is a two-phase flow calculation, modeling the extraction of oil by water injection. FlexPDE adapts the mesh to the front of the wave.

 Arbitrary Lagrange/Eulerian moving mesh*

FlexPDE 6 allows the definition of mesh-moving equations*, and applies an Arbitrary Lagrange/Eulerian (ALE) formulation. This allows several optional behaviors:

  • By locking the mesh to the fluid velocity, you can create a fully Lagrangian model.
  • Or, you can define a relaxive mesh within moving boundaries to maintain mesh integrity.
  • Or, by omitting the mesh moving equations, you can perform a fully Eulerian computation.

In any case, FlexPDE automatically corrects the PDE system to represent the motion of the mesh.

The problem shown here computes the motion of a gas in a compressor cylinder.

Animate

Mesh

Gas Pressure

Gas Density

Gas Motion

(All animations are FlexPDE native graphical output, assembled into a movie by AnimationShop)

View the problem script

*Note: FlexPDE 6 does not support slip surfaces.

Gas Pressure

Use Table at left
to animate display