Venturi effect

Venturi effect raising a column of liquid. Also see this diagram on Bernouilli’s Principle, or for more related figures, please have a look at the Fluid Dynamics category.

Edit and compile if you like:

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% Author: Izaak Neutelings (November 2020)
\documentclass[border=3pt,tikz]{standalone}
\usepackage{physics}
\usepackage{tikz}
\usepackage[outline]{contour} % glow around text
\tikzset{>=latex}
\contourlength{0.9pt}
\colorlet{mydarkblue}{blue!40!black}
\colorlet{myblue}{blue!30}
\colorlet{myred}{red!65!black}
\colorlet{vcol}{green!45!black}
\colorlet{watercol}{blue!80!cyan!10!white}
\colorlet{darkwatercol}{blue!80!cyan!80!black!30!white}
\tikzstyle{water}=[mydarkblue,top color=watercol!90!black!80,bottom color=watercol!90!black!90,middle color=watercol!80,shading angle=10]
\tikzstyle{air}=[mydarkblue,top color=watercol!90!black!6,bottom color=watercol!90!black!6,middle color=watercol!6,shading angle=0]
\tikzstyle{vvec}=[->,very thick,vcol,line cap=round]
\tikzstyle{force}=[->,myred,very thick,line cap=round]
\tikzstyle{width}=[{Latex[length=3,width=3]}-{Latex[length=3,width=3]}]
\begin{document}
% VENTURI EFFECT
\begin{tikzpicture}
  \def\L{3.1}         % large pipe length
  \def\l{3.6}         % small pipe length
  \def\m{0.22*\L}     % length pipe middle
  \def\Rx{0.20}       % big pipe vertical radius right
  \def\Ry{1.00}       % big pipe vertical radius right
  \def\rx{0.08}       % small pipe horizontal radius left
  \def\ry{0.40}       % small pipe vertical radius left
  \def\t{0.19}        % vertical pipe radius
  \def\h{1.5}         % vertical pipe height
  \def\d{0.12}        % vertical pipe depth in water
  \def\y{1.0}         % height fluid column
  \def\W{2.3}         % width bath top
  \def\w{1.9}         % width bath bottom
  \def\H{0.9}         % height bath
  \def\v{0.45}        % velocity magnitude
  \def\xr{\L+\m+0.08*\l} % ring x position
    
 
 
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