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Local Film thickness data required

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Old   March 29, 2017, 09:51
Default Local Film thickness data required
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Nitisha Ahuja
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Is it possible to get local time varying film thickness at each cell of the wall. Or can I get local cell area and the film mass in that cell through which I can get local film thickness. I tried exporting mass data for a clip plane from Ensight, but the mass information I get seems not correct. For example for a film I am getting decrease in mass instead of increase in mass.
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Old   March 29, 2017, 10:39
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Yajuvendra Shekhawat
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Hi Nitisha,

You can get film height in your post files by adding film_ht in your post.in or through Converge Studio by Case Setup -> Output/Post Procesing -> Post variable selection -> Cells -> Boundary/Film -> Film -> Film Thickness

Below is an example of post.in which outputs film thickness

Code:
#!CONVERGE_VERSION=2.3.0
 #=======================
 

 <cells>
 mass                    Cell mass (Kg).
 pressure                Cell pressure (N/m^2).
 temp                    Cell temperature (K).
 velocity                All three components of cell velocity (m/s).
 massfrac(IC8H18)        Mass fraction of species, species name must appear exactly as in "mech.dat" or "species.in".
 massfrac(O2)            Mass fraction of species, species name must appear exactly as in "mech.dat" or "species.in".
 massfrac(CO2)           Mass fraction of species, species name must appear exactly as in "mech.dat" or "species.in".
 passive(INTAKE)         passive_species value, passive_species name must appear exactly as in "species.in".
 passive(EXHAUST)        passive_species value, passive_species name must appear exactly as in "species.in".
 passive(CYLINDER)       passive_species value, passive_species name must appear exactly as in "species.in".
 eps                     Cell turbulence dissipation rate (m^2/s^3).
 tke                     Cell turbulent kinetic energy (m^2/s^2).
 film_ht                 Cell liquid film thickness (m).
 

 <parcels>
 radius                  Parcel radius (m).
 temp                    Parcel temperature (K).
 velocity                All three components of parcel velocity (m/s).
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Old   March 29, 2017, 10:42
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Thanks a lot, but this will give me an average thickness on the impinging wall surface?
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Old   March 29, 2017, 10:45
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Okk... I get it now. Can I get cell area also the same way?
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Old   March 29, 2017, 11:18
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Cell boundary area is not a standard output. But you can create a non-transport passive and use UDF to assign the boundary area to this passive, and output that in your post file.
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