[KapilO8]

What is the recommended method to setup a study for swirl measurement in Studio? I have seen various research papers directly simulating with moving piston boundary and valves. However, converge examples show no moving boundaries and involve a separate swirl measurement region.

Also what is the difference in HDSI 6mm & 2mm in examples provided.

[ksrivast]

Hello Kapil,

The example case in CONVERGE is based on an experimental flowbench setup, which is a mechanical device used to analyze flow through engine components. This setup predicts mass flow rates thought the intake ports at various valve lift positions, and also the torque induced at predetermined locations. A measuring device (impulse torque swirl meter) replaces the piston in physical setups to measure angular momentum flux. For CONVERGE simulations, this is replaced by a separate region.

While flowbench data is a great tool to estimate the swirl ratio in the actual engine, there are some limiting factors that do not provide us with a perfect match with a running engine (Steady-vs-dynamic flows, Air-only-vs-Wet flow, mechanical differences(piston)).

The difference between the two setups is the valve lift (2mm vs 6mm)

Sincerely,