fibre_bed.tex

\documentclass[a4paper,10pt]{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{lmodern}
\pagestyle {empty} % removes the page numbers

\input{nots.tex}

\usepackage{tikz}
\usetikzlibrary{arrows,calc,shapes,positioning}
% old
% \usetikzlibrary{arrows,calc,shapes,decorations.pathreplacing}

% https://tex.stackexchange.com/questions/54252/minimum-height-in-split-rectangle
% \def\mystrut{\vrule height 1.5cm depth 1.5cm width 0pt}

\begin{document}
\begin{tikzpicture}
  [every node/.style={blue}]

  \begin{scope}
    [every node/.style={draw, rectangle split,
    rectangle split parts=10,minimum width=1cm, thick}]
  \node (R) at (2,4){
    % \nodepart{two}
    % \nodepart{three}
    };
  \end{scope}

  \draw[<-, ultra thick,blue] ($(R.north)+(0,3pt)$) to node[left,midway]{$F(t)$} ++(0,1.5);

  \node (temp) at ($(R.north)+(+30pt,+30pt)$) {$\temp(t)$};
  \node (temp) at ($(R.north)+(-30pt,+0pt)$) {$u(L,t)$};
  \node (parameters) at ($(R.south)+(+0pt,-20pt)$) {$\permeab(x),\viscos(t)$};
  \node (pressure) at ($(R.west)+(-35pt,+0pt)$) {$\efstress(x,t),\press(x,t)$};
  
  \node (xL) at ($(R.north)+(+30pt,0)$) {$x=L$};
  \node (x0) at ($(R.south)+(+30pt,0)$) {$x=0$};

  % \node ()[left,midway]{$F$}
    % \draw[decorate,decoration={brace,raise=6pt,amplitude=10pt}, thick]
    % (R.north east)--(R.south east); 
  \draw[->] ($(R.south)+(-30pt,0)$)  to 
    node[left,midway]{$x$}++(0,1) ;    
\end{tikzpicture}
\end{document}