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When can I assume that a process is steady state?

- July 31, 2020 at 1:56 pm
  
  Keyur Kanade
  Ansys Employee
  
  When can I assume that a process is steady state?
- July 31, 2020 at 1:57 pm
  
  Karthik Remella
  Administrator
  
  In systems theory, a system or a process is in a steady state if the variables (called state variables) which define the behavior of the system or the process are unchanging in time.
- July 31, 2020 at 1:58 pm
  
  prajput
  Ansys Employee
  
  To add to @kremella 's response...Certain unsteady processes can also be approximated as steady ones. For example if the variation if the variables over time is small a process can be assumed to be steady state.
  Under this assumption the time derivative in the governing equations can be neglected and the analysis is simplified.

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