Extractor
Introduction
Extractors are measurement surfaces for extracting various results from the simulation.
Description
Extractors are intended to provide more flexible post-processing and interpolation options by enabling runtime interpolation, access to solid data, moving interpolation surfaces, custom output times, and providing variables that are not immediately available through regular field output.
An extractor consists of a set of interpolation points that may follow a solid phase of interest and interpolate different simulation variables at set sampling intervals.
Name
User-defined name for the extractor.
- All moving bodies
This option will automatically export the extractor definition for all the moving bodies in the simulation.
- Extract faces
The select faces option is used to select the faces of input mesh bodies that should be used as an extractor. For the selected faces, an STL file will be exported.
Select faces
The select faces option is used to select the faces of input mesh bodies that should be used as an extractor. For the selected faces, an STL file will be exported.
Flow Outputs
Density – This is the value of fluid density at the extractor point. When surrounded by fluid phases and away from any solid, an extractor point interpolates the density of the particles assuming constant particle volume.
Pressure – Pressure of the fluid interpolated from fluid and solid particles. The pressure on the solid particles is the value required to satisfy boundary conditions on the fluid.
Velocity – Velocity of the fluid interpolated from fluid particle velocity and solid particle boundary velocity.
Heat Transfer Coefficients
Empirical - The empirical formula for an isothermal flat plate heating fluid is used to calculate an HTC value based on a locally interpolated velocity. The obtained HTC is then averaged over a number of snapshots.
Advanced Options
Output time interval – The time interval between non-synchronized outputs, starting from the beginning of this run segment.
Follow moving body– The extractor can follow a MOVINGWALL phase with a predefined motion.
Other Options - A free text box where additional parameters can be specified.