Update index.html

docs/index.html

@@ -207,6 +207,15 @@ <h2 class="title is-3">NeuralDEM: the method</h2>
 <section class="section">
   <div class="container is-max-desktop">
     <div class="content is-max-desktop has-text-centered"><h2 class="title is-3">Hopper: draining</h2></div>
+    <div class="content has-text-justified">
+          <p>
+      Hoppers are industrially used for short as well as long term storage of particulate material, show-
+casing slow and pseudo-steady macroscopic behavior. DEM is the preferred method since the air
+around the particles can usually be neglected due to the slow velocities in the system. In our experi-
+ments, the hopper geometry is filled with 250k particles, which gradually exit
+the domain over the simulation duration when the hopper empties.
+          </p>
+    </div>
     <div class="content is-max-desktop has-text-centered"><h2 class="title is-4">Mass flow</h2></div>
     <div class="columns is-mobile is-centered has-text-centered">
       <div class="column is-half-desktop is-half-mobile">