Here's a little article on fire simulation at Industrial Light and
Magic/Stanford that mentions adaptive gridding which some of us have been
discussing at FRIAM:
http://cgw.pennnet.com/Articles/Article_Display.cfm?ARTICLE_ID=244742&p=18&cat=WEBX&pc=ENL
Looks like they're relying on octrees, 3D versions of quadtrees used by Frank in
his GIS work:
http://hpcc.engin.umich.edu/CFD/users/charlton/Thesis/html/node29.html-S
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