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diff --git a/public/index.html b/public/index.html
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--- a/public/index.html
+++ b/public/index.html
@@ -268,7 +268,7 @@
               <div class="card mb-4 shadow-sm extension">
                 <h5>Wind in Stuttgart, Kernerviertel</h5>
                 <!-- <svg class="bd-placeholder-img card-img-top" width="100%" height="225" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid slice" focusable="false" role="img" aria-label="Placeholder: Thumbnail"><title>Placeholder</title><rect width="100%" height="100%" fill="#55595c"/><text x="50%" y="50%" fill="#eceeef" dy=".3em">Thumbnail</text></svg> -->
-                <img class="thumbimg" src="imgs/thumbnails/Kirchturm.JPG" alt="">
+                <img class="thumbimg" src="imgs/thumbnails/Kirchturm_keine_Partikel.jpg" alt="">
                 <div class="card-body">
                   <p class="card-text">Visualisation of wind around three target buildings (red) near a church with spire and surrounded by numerous building layers (colors). The streamlines results from a Computational Fluid Dynamic simulation of the air flow with RANS (Reynold-Averaged Navier Stokes Equations) and the k-omega SST Turbulence model.</p>
                   <!-- <small class="text-muted">9 mins</small> -->
@@ -297,7 +297,7 @@
               <div class="card mb-4 shadow-sm extension">
                 <h5>Wind in Stuttgart, Kernerviertel (Partikel)</h5>
                 <!-- <svg class="bd-placeholder-img card-img-top" width="100%" height="225" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid slice" focusable="false" role="img" aria-label="Placeholder: Thumbnail"><title>Placeholder</title><rect width="100%" height="100%" fill="#55595c"/><text x="50%" y="50%" fill="#eceeef" dy=".3em">Thumbnail</text></svg> -->
-                <img class="thumbimg" src="imgs/thumbnails/Kirchturm1.JPG" alt="">
+                <img class="thumbimg" src="imgs/thumbnails/Kirchturm_Partikel_1.jpg" alt="">
                 <div class="card-body">
                   <p class="card-text">Wind visualisation with particles around three target buildings (red) near a church with spire and surrounded by numerous building layers (colors). The streamlines results from a Computational Fluid Dynamic simulation of the air flow with RANS (Reynold-Averaged Navier Stokes Equations) and the k-omega SST Turbulence model.</p>
                   <!-- <small class="text-muted">9 mins</small> -->
@@ -315,7 +315,7 @@
               <div class="card mb-4 shadow-sm extension">
                 <h5>Wind in Stuttgart, Kernerviertel (Partikel)</h5>
                 <!-- <svg class="bd-placeholder-img card-img-top" width="100%" height="225" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid slice" focusable="false" role="img" aria-label="Placeholder: Thumbnail"><title>Placeholder</title><rect width="100%" height="100%" fill="#55595c"/><text x="50%" y="50%" fill="#eceeef" dy=".3em">Thumbnail</text></svg> -->
-                <img class="thumbimg" src="imgs/thumbnails/Kirchturm2.JPG" alt="">
+                <img class="thumbimg" src="imgs/thumbnails/Kirchturm_Partikel_2.jpg" alt="">
                 <div class="card-body">
                   <p class="card-text">Wind visualisation with particles around three target buildings (red) near a church with spire and surrounded by numerous building layers (colors). The streamlines results from a Computational Fluid Dynamic simulation of the air flow with RANS (Reynold-Averaged Navier Stokes Equations) and the k-omega SST Turbulence model.</p>
                   <!-- <small class="text-muted">9 mins</small> -->