Update mesh.md

Author: cz295

_projects/mesh.md

@@ -35,7 +35,7 @@ We adopted an approach to track the interface explicitly on a unstructured trian
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-Mesh generation: The goal is to generate a circular interface (drawn in red). We started with just 3 nodes on the interface and gradually refined the mesh. In the final mesh, the region near the interface has much lower mesh size.
+Mesh generation: The goal is to generate a circular interface (drawn in red). We started with just 3 nodes on the interface and gradually refined the mesh. In the final mesh, the region near the interface has much smaller mesh size.
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