*ADPM
r1
r1: r*8: Tolerance for element coarsening. Default 50.d0
This option turns on moving-source adaptivity and can only be used for moving heat source powder bed thermal analyses of a single layer. When the temperature gradient across an element equals r1 or below, the element will be eligible for coarsening.
Required Cards: This card requires the use of *DDMP and *LSRP.
The effect of using *ADPM is shown in the figures below, along with the associated single CPU run times. Without using *ADPM, the mesh has excessive resolution to resolve the problem. Using the default value of 50 reduces simulation time by 82%. Changing the value of *ADPM to 100 generates a further reduction of run time of 31% over the default value. A similar reduction of time is achieved by using *ADPM of 1000, but note in the fourth figure that thermal aberrations occur. These are due to the improper integration of heat over the part.
Best Practices: The default value of 50 is a good compromise between speed and accuracy. *ADPM should not be set below 25.
*ADPM = off, Run time = 3797 *ADPM = 50, Run time = 665
*ADPM = 100, Run time = 461 *ADPM = 1000, Run time = 306