Determining Collection Efficiency When Using Lagrangian Multi-phase

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 October 15, 2017, 21:58 Determining Collection Efficiency When Using Lagrangian Multi-phase #1 New Member   Paul Join Date: Feb 2017 Posts: 13 Rep Power: 7 Hello all, I am currently simulating water droplet impingement onto a wing. I am interested in determining the collection efficiency of the wing in order to compare with experimental data. My main question is: is there a direct way of determining collection efficiency that is built into STAR? If not, is there a way to write a field function that references values from the previous time step? I know there are a few ways of calculating collection efficiency. Specifically = ( * dh/dt)/(LWC * V_inf)-- where is the collection efficiency, is the film density, dh/dt is the increase in fluid film thickness over time, LWC is the liquid water content, and V_inf is the free stream velocity.If I am able to reference the previous time step values, I can just create a scene of a field function using (Film_Thickness_t-step2 - Film_Thickness_t-step1) = dh/dt. I would appreciate any input/suggestions you all may have. Thank you!

 March 12, 2019, 19:00 #2 New Member   Ilia Art Join Date: Jan 2019 Posts: 2 Rep Power: 0 Hi, Did you solve this problem? I have a similar problem for the steady flow simulation with Lagrangian Multiphase. Can not find any field functions that could satisfy the collection efficiency calculation.

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