diff --git a/docs/assets/FluidDynamics.webp b/docs/assets/FluidDynamics.webp
new file mode 100644
index 0000000..d4c6178
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diff --git a/docs/index.html b/docs/index.html
index 348e323..591ebef 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -283,7 +283,7 @@ <h1>OpenPhysics</h1>
     <section>
       <div class="section-head">
         <h2>Core Simulations</h2>
-        <span class="count">18</span>
+        <span class="count">19</span>
       </div>
       <div class="grid">
         <a class="card" href="https://openphysics.github.io/ACPhasor/" style="--hue: 33;">
@@ -315,7 +315,7 @@ <h3>Carnot Heat Engine</h3>
               <h3>Crystal Lattice</h3>
               <span class="card-arrow" aria-hidden="true">&rarr;</span>
             </div>
-            <p>Explore crystal structure across five screens: the five 2D Bravais lattices, the cubic unit cells and their packing factors, hexagonal against cubic close packing, Miller indices for planes and directions, and finally aperiodic order — Penrose tilings and the hat monotile, whose diffraction patterns are as sharp as a crystal's with a symmetry no crystal can have.</p>
+            <p>Explore crystal structure across five screens: the five 2D Bravais lattices, cubic unit cells and packing factors, hexagonal vs cubic close packing, Miller indices, and aperiodic order — Penrose tilings and the hat monotile, with diffraction as sharp as a crystal's but a symmetry no crystal can have.</p>
             <div class="tags"><span class="tag">crystallography</span><span class="tag">Bravais lattices</span><span class="tag">unit cells</span></div>
           </div>
         </a>
@@ -330,6 +330,17 @@ <h3>Doppler Effect</h3>
             <div class="tags"><span class="tag">waves</span><span class="tag">sound</span><span class="tag">frequency</span></div>
           </div>
         </a>
+        <a class="card" href="https://openphysics.github.io/FluidDynamics/" style="--hue: 244;">
+          <div class="thumb"><img src="assets/FluidDynamics.webp" alt="Fluid Dynamics simulation screenshot" loading="lazy" decoding="async" width="1154" height="753"><span class="badge">FD</span></div>
+          <div class="card-body">
+            <div class="card-head">
+              <h3>Fluid Dynamics</h3>
+              <span class="card-arrow" aria-hidden="true">&rarr;</span>
+            </div>
+            <p>Explore fluid flow concepts — Intro and Lab screens for interactive fluid dynamics.</p>
+            <div class="tags"></div>
+          </div>
+        </a>
         <a class="card" href="https://openphysics.github.io/LightPropagation/" style="--hue: 220;">
           <div class="thumb"><img src="assets/LightPropagation.webp" alt="Light Propagation simulation screenshot" loading="lazy" decoding="async" width="1154" height="753"><span class="badge">LP</span></div>
           <div class="card-body">
@@ -381,7 +392,7 @@ <h3>Oscilloscope</h3>
               <h3>Plate Tectonics</h3>
               <span class="card-arrow" aria-hidden="true">&rarr;</span>
             </div>
-            <p>Interactive map of the Earth's tectonic plates drawn entirely from real data — PB2002 plate boundaries, USGS earthquakes, Holocene volcanoes and NOAA relief — plus cross-sections through a subduction zone, a spreading ridge and a transform fault, and a reconstruction clock running 50 Myr either side of the present.</p>
+            <p>Interactive map of the Earth's tectonic plates drawn entirely from real data — PB2002 plate boundaries, USGS earthquakes, Holocene volcanoes and NOAA relief — plus cross-sections through a subduction zone, a spreading ridge and a transform fault, and a reconstruction clock running 50 Myr either side of the present. Two further screens port the tabs of PhET's Java simulation: crustal isostasy, and the evolution of a convergent or divergent plate boundary.</p>
             <div class="tags"><span class="tag">plate tectonics</span><span class="tag">seismology</span><span class="tag">volcanism</span></div>
           </div>
         </a>
@@ -661,7 +672,7 @@ <h3>Variable Star Photometry</h3>
     </main>
 
     <footer>
-      <p>32 live simulations &middot; Built with <a href="https://scenerystack.org/">SceneryStack</a> &middot; GNU Affero GPL v3 &middot;
+      <p>33 live simulations &middot; Built with <a href="https://scenerystack.org/">SceneryStack</a> &middot; GNU Affero GPL v3 &middot;
       <a href="https://github.com/OpenPhysics/Baton">OpenPhysics/Baton</a></p>
     </footer>
   </div>
diff --git a/screenshots/FluidDynamics.png b/screenshots/FluidDynamics.png
new file mode 100644
index 0000000..25436ff
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diff --git a/structure/repos.json b/structure/repos.json
index 7e160e8..03c4a8b 100644
--- a/structure/repos.json
+++ b/structure/repos.json
@@ -276,6 +276,26 @@
       ],
       "status": "active"
     },
+    {
+      "name": "FluidDynamics",
+      "displayName": "Fluid Dynamics",
+      "type": "simulation",
+      "isSimulation": true,
+      "lineage": "original",
+      "upstream": null,
+      "language": [
+        "TypeScript"
+      ],
+      "framework": "SceneryStack",
+      "description": "Explore fluid flow concepts — Intro and Lab screens for interactive fluid dynamics.",
+      "deployedUrl": "https://openphysics.github.io/FluidDynamics",
+      "physicsTopics": [],
+      "screens": [
+        "Intro",
+        "Lab"
+      ],
+      "status": "active"
+    },
     {
       "name": "HabitableZones",
       "displayName": "Habitable Zones",
@@ -594,17 +614,21 @@
         "TypeScript"
       ],
       "framework": "SceneryStack",
-      "description": "Interactive map of the Earth's tectonic plates drawn entirely from real data — PB2002 plate boundaries, USGS earthquakes, Holocene volcanoes and NOAA relief — plus cross-sections through a subduction zone, a spreading ridge and a transform fault, and a reconstruction clock running 50 Myr either side of the present.",
+      "description": "Interactive map of the Earth's tectonic plates drawn entirely from real data — PB2002 plate boundaries, USGS earthquakes, Holocene volcanoes and NOAA relief — plus cross-sections through a subduction zone, a spreading ridge and a transform fault, and a reconstruction clock running 50 Myr either side of the present. Two further screens port the tabs of PhET's Java simulation: crustal isostasy, and the evolution of a convergent or divergent plate boundary.",
       "deployedUrl": "https://openphysics.github.io/PlateTectonics",
       "physicsTopics": [
         "plate tectonics",
         "seismology",
         "volcanism",
         "geophysics",
-        "plate reconstruction"
+        "plate reconstruction",
+        "isostasy",
+        "subduction"
       ],
       "screens": [
-        "Plate Tectonics"
+        "Plate Tectonics",
+        "Crust",
+        "Plate Motion"
       ],
       "status": "active"
     },