Update app.py

app.py

@@ -1,5 +1,7 @@
 import streamlit as st
 import math
+import matplotlib.pyplot as plt
+import numpy as np
 
 def calculate_pipe_diameter(flow_rate, velocity):
     """Calculate the pipe diameter using the formula:
@@ -44,6 +46,26 @@ def main():
         else:
             st.error("Velocity must be greater than zero.")
 
+    # Graphical visualization
+    st.markdown("### Pipe Diameter Visualization")
+    st.write("This graph shows the relationship between pipe diameter and velocity for the specified flow rate.")
+
+    min_velocity = st.sidebar.number_input("Minimum Velocity (m/s):", min_value=0.01, value=0.5, step=0.1, format="%.2f")
+    max_velocity = st.sidebar.number_input("Maximum Velocity (m/s):", min_value=min_velocity + 0.1, value=5.0, step=0.1, format="%.2f")
+
+    velocities = np.linspace(min_velocity, max_velocity, 100)
+    diameters = [calculate_pipe_diameter(flow_rate, v) for v in velocities]
+
+    fig, ax = plt.subplots()
+    ax.plot(velocities, diameters, label="Pipe Diameter vs Velocity", color="blue")
+    ax.set_xlabel("Velocity (m/s)")
+    ax.set_ylabel("Pipe Diameter (m)")
+    ax.set_title("Recommended Pipe Diameter Across Velocity Range")
+    ax.grid(True)
+    ax.legend()
+
+    st.pyplot(fig)
+
     # Sidebar for additional information
     st.sidebar.header("About the App")
     st.sidebar.markdown("This application helps you calculate the recommended pipe diameter for a given flow rate and velocity.")
@@ -55,4 +77,4 @@ def main():
     st.markdown("**Developed by [Your Name]**")
 
 if __name__ == "__main__":
-    main()
+    main()