Experimental Research of Dynamic Instabilities in the Presence of Coiled Wire Inserts on Two-Phase Flow

Table 1

The tube characteristics.

Tube name	Tube characteristics	𝐷𝑒 (mm)	Pitch ratio
Tube-1	Smooth tube	8.95	—
Tube-2	Ring diameter: 1.8 mm, the pitch: 5 mm	7.96	3.33
Tube-3	Ring diameter: 1.8 mm, the pitch: 10 mm	8.44	2.77