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Reference.org
Upwind differencing scheme for convection
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<p>The upwind differencing scheme is a method used in numerical methods in <a href="/facts/Computational_fluid_dynamics/zuWdtNJp">computational fluid dynamics</a> for <a href="/facts/Convection/E8vsCPhu">convection</a>–<a href="/facts/Diffusion/KbAxroBa">diffusion</a> problems. This scheme is specific for <a href="/facts/Peclet_number/lIGehNcg">Peclet number</a> greater than 2 or less than −2 </p>