Step 5-D
Coupling Equation Churn-turbulent Flow Regime Report
Basic Data Tab
From the Mach II Basic Data Tab, click the "Run Coupling Equation" button to run the coupling equation. Wow! Here you see the power and speed of the Mach II calculation engine that is running thousands of simulations to calculate the maximum fluid flux (Gmax) by iterating the mass fraction of vapor entering the nozzle, until the left-hand side (LHS) and (RHS) Right-hand side of the coupling equation converge. The power and speed of Mach II calculation engine is witnessed right before your eyes as it generates the graph of the coupling equation and shows the intersection of the LHS vs. RHS. Above the graph you can examine all the input data and even make, "what if", changes to the data to see how it will affect results. This feature is one of the most powerful and useful tools provided by the Mach II system for two-phase relief design.
Churn-turbulent Report
Close the coupling equation graph and click "Generate Report", the Mach II will generate a complete design report based on the coupling equation. If you scroll to page three (3) of the report you will see a record of the results of the coupling equation. For churn-turbulent flow the vent rate is determined to be 203,689 which is 63,000 lb/hr different from for the homogeneous flow regime.
