Update app.py

app.py

@@ -0,0 +1,60 @@
+# app.py
+import streamlit as st
+
+def main():
+    st.title("Fluid Mechanics Concepts and Formulas")
+    st.sidebar.title("Navigation")
+
+    menu = ["Home", "Concepts", "Formulas"]
+    choice = st.sidebar.radio("Select a section:", menu)
+
+    if choice == "Home":
+        st.subheader("Welcome to the Fluid Mechanics App")
+        st.write("""
+            This app provides key concepts and formulas for fluid mechanics. 
+            Use the sidebar to navigate between different sections.
+        """)
+
+    elif choice == "Concepts":
+        st.subheader("Key Concepts in Fluid Mechanics")
+        st.write("### 1. Fluid Properties")
+        st.write("""- **Density (\(\rho\))**: Mass per unit volume.
+                 \[\rho = \frac{m}{V}\]
+               - **Viscosity (\(\mu\))**: A measure of a fluid's resistance to deformation.
+               - **Pressure**: Force exerted per unit area.
+        """)
+        st.write("### 2. Flow Types")
+        st.write("""- **Laminar Flow**: Smooth, orderly flow.
+               - **Turbulent Flow**: Irregular, chaotic flow.
+        """)
+        st.write("### 3. Bernoulli's Principle")
+        st.write("""In a streamline flow, the total energy per unit volume remains constant:
+               \[P + \frac{1}{2}\rho v^2 + \rho gh = \text{constant}\]
+        """)
+
+    elif choice == "Formulas":
+        st.subheader("Fluid Mechanics Formulas")
+
+        st.write("### 1. Continuity Equation")
+        st.latex(r"A_1 v_1 = A_2 v_2")
+        st.write("""The product of cross-sectional area and velocity is constant for an incompressible fluid.
+        """)
+
+        st.write("### 2. Bernoulli's Equation")
+        st.latex(r"P + \frac{1}{2}\rho v^2 + \rho gh = \text{constant}")
+        st.write("""Relates pressure, velocity, and height in a flowing fluid.
+        """)
+
+        st.write("### 3. Reynolds Number")
+        st.latex(r"Re = \frac{\rho v D}{\mu}")
+        st.write("""Determines whether flow is laminar or turbulent.
+        """)
+
+        st.write("### 4. Hydrostatic Pressure")
+        st.latex(r"P = \rho g h")
+        st.write("""Pressure at a depth \(h\) in a fluid of density \(\rho\).
+        """)
+
+if __name__ == '__main__':
+    main()
+