[FLASH-USERS] [Flash] ray tracing issue

[pchang]

Hi all,
I am using flash to simulate the implosion of a cylindrical target using 
lasers. Please see the attached file. I am using the cubic interpolation 
with Runge Kutta Integration ray tracing in most recent version, 
FLASH4.3, but similar issue was observed in Kaiser ray tracing in 
FLASH4.2. The issue is I have more than 20 beams passing through each 
grid (I have tried the case with about 50 beams/grid) in my simulation. 
I should expect a smooth energy deposition. However, I always see "ray 
traces" in the energy deposition plot. The separation of those ray 
traces are much bigger than the grid size. It doesn't make sense to me 
since I have so many rays passing through each grid, how come I still 
have non-uniform energy deposition.
Does anyone encounter similar issues?
Thank you,

Po-Yu

-- 
Po-Yu Chang

Postdoctoral Associate
Department of Mechanical Engineering,
Fusion Science Center for Extreme States of Matter,
Laboratory for Laser Energetics
University of Rochester
250 East River Road
Rochester, New York 14623
Phone: (585) 273-5179
FAX: (585) 275-5960
pchang at lle.rochester.edu

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