Collection Efficiency in Fluent?
Has anyone done any work to find collection efficiency for icing applications using Fluent? I appreciate any info.
Thanks, Jason |
Re: Collection Efficiency in Fluent?
solve the flowfield in fluent and then use a NASA code called LEWICE or LEWI3DGR
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Re: Collection Efficiency in Fluent?
I think you can use udf
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collection efficiency
Hi,
I have many document about computing collection efficiency with fluent, but now I deal with it and I couldn't take correct answer. Quote:
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Hi all.
Hav eyou succeded in implementing a model/simulation using just Ansys for icing accretion, in the end? If so, how were you able to do so? Thanks a lot, Marta |
Dear aminrbspace: can you provided us with your documents about computing collection efficiency with fluent . I trying to compute the collection efficiency in cyclone separator with fluent but I don't Know how to do that?
Thank you so much |
It's impressive how there is no answer to these questions on internet. Couldn't find either a proper answer on how to compute the local collection efficiency through the "DPM accretion rate" of fluent. It seems that the notion of flux : kg/m2.s at injection is unclear, especially for 2D axisymmetric since the accretion rate is given in kg/m2.s while the face magnitude used is supposed to be in "m" since it is 2D.
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yes I agree with you, this was clear for me but in my situation I cannot inject on each cell, I have to inject along a line using group type with much more injected points than cells.
So the only challenge is knowing what should be this injected area for a specific stream (since for each stream I should have a specific area). Since the macro DPM_EROSION gives me the kg/m2-s at each cell along my wall, its quite easy to divive by the constant flow rate (kg/m2-s) injected constantly along my line using a linear distribution of the injected mass flow rate. At first for 2D axisymmetric I was using : area_injected = 4*pi*r*dr with r being the position injected; dr half the distance between each point injected. But this means that I'm considering the area around 2*PI. Apparently, in DPM_EROSION, fluent is not using the definition of area around 2*PI but for 1readian only, so the (i think) correct area_injected per stream would be : 2*r*dr Then If I fix lets say my; constant along the line, injected flow rate to 1kg/m2-s, I would know the mass flow rate distribution I need to put in FLUENT. (i'm using linear distribution since the area is evolving linearly with respect to r (dr is constant though). |
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