When I try to read the particle_input data, this error occurs. But I check the input file and the data is complete.
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You are solving Energy and species equations, and you are tracking user scalars, so you need some input for these variables (either a constant value for all particles or individual values for each particles). Below is an example for constant values (please adjust to fit your needs):
Coordinates: T Must always be T
Phase_ID: F 1
Diameter: F 0.0010
Density: F 2340.
Velocity: F 0.0 0.0 0.0
Temperature: F 343.15
Species: F 1.0 0.0
User_Scalar: F 0.0 0.0 0.0
With the above, particle_input.dat is read without errors. The simulation fails though, I didn’t attempt to fix it, but it could be that the mass inlet BC with zero velocity is the issue.