Pcm sudden divergence

- December 23, 2022 at 9:27 am
  
  amin98
  Subscriber
  
  Hello everyone,
  I'm trying to simulat the melting of pcm in duct. The source of heat is air at 324k and the pcm initial temperature is 297k..But I'm keep getting a sudden divergence during the soulotion. The case is Transeint with 0.1 time step.
  After 2 weeks of trying.. I'm not getting anywhere..can anyone help me with this?
- December 26, 2022 at 2:18 pm
  
  RM
  Ansys Employee
  
  Hi,
  It is generic error and can occur due to several resons such as mesh, BC and solver schemes. Please ensure that your mesh is of good quality, appropriate boundary conditions are set. Try lowering URF and changing schemes. If it is transient simulation try with PISO scheme.
  Please refer 32.21. Convergence and Stability (ansys.com) for more information on convergence.
  - January 2, 2023 at 4:06 pm
    
    amin98
    Subscriber
    
    Thank sir for your reply..the min ortho quality is 0.4
    The max skewness is 0.76
    The max aspect ratio is 6.8
    The total no of cells is 2,889,650
    I'll try everything you said and let you know..thanks 🌹

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