From 07a63237de774b3a57a0975e03cf2c6b68f165b5 Mon Sep 17 00:00:00 2001
From: Prefetch
Date: Wed, 31 Mar 2021 19:57:54 +0200
Subject: Expand knowledge base

---
 content/know/concept/rayleigh-plateau-instability/index.pdc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'content/know/concept/rayleigh-plateau-instability/index.pdc')

diff --git a/content/know/concept/rayleigh-plateau-instability/index.pdc b/content/know/concept/rayleigh-plateau-instability/index.pdc
index ae0a21d..df3d6ab 100644
--- a/content/know/concept/rayleigh-plateau-instability/index.pdc
+++ b/content/know/concept/rayleigh-plateau-instability/index.pdc
@@ -6,6 +6,7 @@ categories:
 - Physics
 - Fluid mechanics
 - Perturbation
+- Surface tension
 
 date: 2021-03-10T09:13:22+01:00
 draft: false
@@ -110,7 +111,8 @@ $$\begin{aligned}
 
 Before solving this, we need boundary conditions.
 The radial fluid velocity $u_r$ (the $r$-component of $\vec{u}$)
-at the column surface $r\!=\!R$ is the *material derivative* of $R_\epsilon$:
+at the column surface $r\!=\!R$ is the
+[material derivative](/know/concept/material-derivative/) of $R_\epsilon$:
 
 $$\begin{aligned}
     u_r(r\!=\!R)
-- 
cgit v1.2.3