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Found 3 results

  1. If I want to use the solution from a previous run as my initial condition for a restart, do I need to remove the NODAL_INITIAL_CONDITION command from my input file when restarting? The RESTART command simply reads the input data from a previous run (the last run by default unless a different run is specified). Any command appearing after the RESTART command will be processed and overwrite the settings from the previous run. NODAL_INITIAL_CONDITION, however, does have special behavior....when the RESTART command is processed, it automatically uses the data from the previous run. So, here are some scenarios to illustrate RESTART and NODAL_INITIAL_CONDITION. Consider the following input files for the restart run: This will pull the previous run's data for the initial conditions: RESTART {} RUN{} This will also pull the previous run's data for the initial conditions because the RESTART comes after the NODAL_INITIAL_CONDITION command (i.e. the restart data overwrites the NODAL_INITIAL_CONDITION data): NODAL_INITIAL_CONDITION(velocity){ variable = velocity values = {1,0,0} } RESTART {} RUN{} This will OVERWRITE the previous run's data for the initial conditions with 1,0,0 because NODAL_INITIAL_CONDITION comes after RESTART: RESTART{} NODAL_INITIAL_CONDITION(velocity){ variable = velocity values = {1,0,0} } RUN{}
  2. The AcuSolve tool (shell script) 'reform' reformats existing files - and can be used to extract nodes from a surface or volume. It is located in the /tools/ directory of Linux/Unix installations. Extract nodes from a surface (.ebc) file: reform -3,100,1 surface1.ebc | sort -nu > surface1.nbc Extract nodes from a volume (.cnn) file: reform -2,100,1 volume1.cnn | sort -nu > volume1.nbc
  3. In the AcuSolve ..Log file, the first line of the time step indicates the Time Increment and the Time at the start of the time step, before any calculation has been done for that time step. Thus, at the start of a new calculation, the starting Time value will be 0.0. Once the calculation has started for the time step, the time advances, and any 'Time' value returned by a UDF or used within the calculation will be the advanced time for that time step.
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