Initial condition from another simulation

- November 18, 2023 at 11:22 am
  
  Alberto
  Subscriber
  
  Hi,
  It is possible to use the .dat and .cas files from the last saved timestep and use as initial condition for a new simulation ? Also if the mesh is changed ?
  
  Many thanks in advance
- November 20, 2023 at 1:42 pm
  
  Federico
  Ansys Employee
  
  Hello,
  yes you can read .cas and .dat files together and run from there. You can also read a .dat file on a new mesh, as long as this new mesh has the same topology as the previous mesh, i.e. same zones, etc.
  - November 20, 2023 at 1:43 pm
    
    Federico
    Ansys Employee
    
    Fluent will interpolate/extrapolate the data between nodes, depending if your new mesh is finer/coarser.
- November 20, 2023 at 4:41 pm
  
  Alberto
  Subscriber
  
  Many thanks, yes I want to change the size of the computational domain in order to elongate it, so the mesh will change but the zones no.