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However, viscosity remains crucial near solid boundaries, in the\n            <jats:italic>boundary layer<\/jats:italic>\n            , to a large extent determining the look of the flow as a function of Reynolds number. Typical graphics simulations do not resolve boundary layer dynamics, so their look is determined mostly by numerical errors with the given grid size and time step, rather than physical parameters. We introduce two complementary techniques to capture boundary layer dynamics, bringing more physical control and predictability. We extend the FLIP particle-grid method with viscous particle strength exchange[Rivoalen and Huberson 2001] to better transfer momentum at solid boundaries, dubbed VFLIP. We also introduce Weakly Higher Resolution Regional Projection (WHIRP), a cheap and simple way to increase grid resolution where important by overlaying high resolution grids on the global coarse grid.\n          <\/jats:p>","DOI":"10.1145\/2897824.2925910","type":"journal-article","created":{"date-parts":[[2016,7,11]],"date-time":"2016-07-11T16:04:33Z","timestamp":1468253073000},"page":"1-8","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":17,"title":["Resolving fluid boundary layers with particle strength exchange and weak adaptivity"],"prefix":"10.1145","volume":"35","author":[{"given":"Xinxin","family":"Zhang","sequence":"first","affiliation":[{"name":"UBC Computer Science"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Minchen","family":"Li","sequence":"additional","affiliation":[{"name":"UBC Computer Science"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Robert","family":"Bridson","sequence":"additional","affiliation":[{"name":"UBC Computer Science, Autodesk Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"320","published-online":{"date-parts":[[2016,7,11]]},"reference":[{"key":"e_1_2_2_1_1","doi-asserted-by":"publisher","DOI":"10.1145\/2461912.2461982"},{"key":"e_1_2_2_2_1","doi-asserted-by":"publisher","DOI":"10.1111\/cgf.12576"},{"key":"e_1_2_2_3_1","doi-asserted-by":"publisher","DOI":"10.1145\/1276377.1276502"},{"key":"e_1_2_2_4_1","unstructured":"Bridson R. 2008. 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