From 7f65c526132ee98d59d1a2b53d08c4b49330af03 Mon Sep 17 00:00:00 2001 From: Prefetch Date: Sat, 28 Jan 2023 11:04:09 +0100 Subject: Improve knowledge base --- source/know/concept/reynolds-number/index.md | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) (limited to 'source/know/concept/reynolds-number/index.md') 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} -- cgit v1.2.3