ANSYS Fluent: Plotting Pressure Change and Determining Pressure Drop in Pipes

 Here's how to address your questions about plotting pressure change and determining pressure drop in ANSYS Fluent:

Plotting Pressure Change:

 * Surface Reports: Utilize Surface Reports in ANSYS Fluent to obtain average pressure values at the inlet and outlet faces.

 * Create a Derived Quantity: Define a derived quantity in Fluent that subtracts the inlet average pressure from the outlet average pressure. This will represent the pressure change across the pipe segment.

 * Line Plot: Generate a line plot using the derived quantity to visualize the pressure change along the flow path. You can create a line intersecting the inlet and outlet faces to extract pressure data along that path.

Determining Pressure Drop Across T-Junction:

 * Surface Reports: Similar to above, use Surface Reports to obtain average static pressure values at the inlet and outlet of the T-junction you're interested in.

 * Pressure Drop Calculation: Subtract the outlet's average static pressure from the inlet's average static pressure to determine the pressure drop across the T-junction.

 * Loss Coefficient: Static pressure is recommended for calculating pressure drop across pipe fittings like T-junctions to determine the associated loss coefficient. This is because static pressure represents the usable energy in the fluid stream, and the loss coefficient accounts for energy dissipation due to the fitting.

Additional Tips:

 * Ensure you're capturing pressure data at the appropriate locations (center of inlet/outlet faces) for accurate results.

 * Consider using path functions in Fluent to extract pressure data along specific flow paths within the pipe segment.

For more in-depth information, refer to the ANSYS Fluent documentation on surface reports, derived quantities, and pressure monitors.

Keywords : 

 * ANSYS Fluent

 * Pressure change

 * Line plot

 * Surface reports

 * Derived quantities

 * Pressure drop

 * T-junction

 * Static pressure

 * Loss coefficient

 * Path functions