Validation of the HAM-Based Solution (Eq. (26) with Eq. (32)): (a) with numerical solution (the 4th order RK method) (A = 1.444, α = 0.978, a/h = 0.03, Ca/h = 0.077, nH = 3.562, h = −0.662) and (b) with Run S12 of Einstein and Chien[54] data.