Table 1. Comparison of the present results obtained using the Riemann-Sum Approximation approach (RSA) with those of Jha and Yahaya [22] for the transient state velocity

t

λ

Present work RSA (ω = 0)

Jha and Yahaya [22]

exact solution

0.2

1.2

0.0530

0.0600

1.4

0.0707

0.0813

1.6

0.0645

0.0745

1.8

0.0402

0.0460

0.4

1.2

0.0591

0.0600

1.4

0.0800

0.0813

1.6

0.0733

0.0745

1.8

0.0453

0.0460

SS

1.2

0.0600

0.0600

1.4

0.0813

0.0813

1.6

0.0745

0.0745

1.8

0.0460

0.0460