Table 4 The time at stops wave maker \(t_{1}\), elongation e, depth of fluid h, integer N, gravity g and tolerance for hyperbolic tangent movement displacement of the piston wave maker

\(t_{1}(s)\)

e(cm)

h(cm)

N

\(\bigtriangleup K_{n}\)

\(\varepsilon \)

\(g(\hbox {cm}/\hbox {s}^{2})\)