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pcarruscag merged 1 commit into from
Feb 10, 2023
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document point probes #123

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4 changes: 3 additions & 1 deletion _docs_v7/Custom-Output.md
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Expand Up @@ -218,6 +218,7 @@ The available types are:
- `Function`: Introduces a new scalar output that is a function of other scalar outputs, it cannot reference fields (e.g. velocity).
- `AreaAvg` and `AreaInt`: Computes an area average or integral of a field (the expression) over the list of markers.
- `MassFlowAvg` and `MassFlowInt`: Computes a mass flow average or integral.
- `Probe`: Evaluates the expression using the values of the mesh point closest to the coordinates specified inside "[]", [x, y] or [x, y, z] (2 or 3D).

**Note:** Each custom output can only use one type, e.g. it is not possible to write `p_drop : AreaAvg{PRESSURE}[inlet] - AreaAvg{PRESSURE}[outlet]`. This would need to be separated into two `AreaAvg` outputs and one `Function` to compute their difference.

Expand All @@ -226,7 +227,8 @@ The available types are:
CUSTOM_OUTPUTS= 'velocity : Macro{sqrt(pow(VELOCITY_X, 2) + pow(VELOCITY_Y, 2) + pow(VELOCITY_Z, 2))};\
avg_vel : AreaAvg{$velocity}[z_minus, z_plus];\
var_vel : AreaAvg{pow($velocity - avg_vel, 2)}[z_minus, z_plus];\
dev_vel : Function{sqrt(var_vel) / avg_vel}'
dev_vel : Function{sqrt(var_vel) / avg_vel};\
probe1 : Probe{$velocity}[0.005, 0.005, 0.05]'
```

To obtain the list of solver variables that can be used, write an invalid expression (e.g. 'x : AreaAvg{INVALID}[]') and run SU2.
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