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Diffstat (limited to 'source/know/concept/reynolds-number/index.md')
-rw-r--r-- | source/know/concept/reynolds-number/index.md | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/source/know/concept/reynolds-number/index.md b/source/know/concept/reynolds-number/index.md index 9ae4f4b..4236617 100644 --- a/source/know/concept/reynolds-number/index.md +++ b/source/know/concept/reynolds-number/index.md @@ -77,15 +77,14 @@ $$\begin{aligned} If we choose $$U$$ and $$L$$ appropriately for a given system, the Reynolds number allows us to predict the general trends. -It can be regarded as the inverse of an "effective viscosity": +It can be regarded as the inverse of an "effective [viscosity](/know/concept/viscosity/)": when $$\mathrm{Re}$$ is large, viscosity only has a minor role, but when $$\mathrm{Re}$$ is small, it dominates the dynamics. Another way is thus to see the Reynolds number as the characteristic ratio between the advective term (see [material derivative](/know/concept/material-derivative/)) -to the [viscosity](/know/concept/viscosity/) term, -since $$\va{v} \sim U$$: +to the viscosity term, since $$\va{v} \sim U$$: $$\begin{aligned} \mathrm{Re} |