Table 3. Parametric Simulation Details of the Different Cavity Structures^a.

category	case no.	cavity shapes	cavity size/mm	cavity number
category 1	1	rectangular cavity	50 × 100	1
cavity shapes	2	semicircle cavity	φ = 112.84	1
	3	square cavity	70.71 × 70.71	1
	4	equilateral triangle cavity	107	1
	5	oval cavity (LA/SA = 2.0)	195.44 × 65.14	1
	6	tube	40 × 40×1000	0
category 2	7	oval cavity (LA/SA = 3.0)	178.42 × 71.36	1
cavity sizes	8	oval cavity (LA/SA = 2.5)	159.58 × 79.78	1
	9	oval cavity (LA/SA = 1.5)	138.20 × 92.14	1
category 3	10	double semicircle cavity	φ = 112.84	2
cavity numbers	11	three semicircle cavity	φ = 112.84	3

^a(1) Category 1 (cavity shapes): the shapes of the cavities were rectangular (50 mm × 100 mm, 100 mm long by 50 mm high), semicircle (φ = 112.84 mm, with a diameter of 112.84 mm), square (70.71 mm × 70.71 mm, 70.71 mm long by 70.71 mm high), equilateral triangle (three sides are 107 mm long), and oval (195.44 mm × 65.14 mm, long and short axis ratio = 2.0, 65.14 mm long by 195.44 mm high). (2) Category 2 (cavity sizes): Based on the oval cavity, the ratios of the long axis and short axis of the oval were established to be 3.0, 2.5, 2.0, and 1.5. The dimensions of case 5, case 7, case 8, and case 9 were 195.44 mm × 65.14 mm (LA/SA = 3, 65.14 mm long by 195.44 mm high), 178.42 mm × 71.36 mm (LA/SA = 2.5, 71.36 mm long by 178.42 mm high), 159.58 mm × 79.78 mm (LA/SA = 2.0, 79.78 mm long by 159.58 mm high), and 78.42 mm × 71.36 mm (LA/SA = 1.5, 71.36 mm long by 78.42 mm high), respectively. (3) Category 3 (cavity numbers): the semicircle cavity, double semicircle cavity, and three semicircle cavities were established. The diameter of the cavity was 112.84 mm.