Update README.md

README.md

@@ -134,6 +134,11 @@ More information [here](https://github.com/inductiva/wind-tunnel/blob/deab68a018
 | ![Input Mesh](https://huggingface.co/datasets/inductiva/windtunnel/resolve/main/assets/streamlines_mesh.png)  |
 
 ### metadata.obj
+This file contains metadata information about the simulation. 
+It consists of input parameters like `wind_speed`, `rotate_angle`, `num_iterations` and ´resolution`.
+It also has output parameters like `drag_coefficient`, `moment_coefficient`, `lift_coefficient`, `front_lift_coefficient`, `rear_lift_coefficient`
+ and the location of the output meshes: 
+ 
   ```json
     {
       "id": "1w63au1gpxgyn9kun5q9r7eqa",