7.2 The effect of the external body force on the physical
fields
This section is devoted to discussing how the existence of the body
force acts on the field variables under the fractional modified model
with two parameters and phase lags (2FDPL). Here, without the external
force, we put \(F_{x}=0\ \) and with the external force we take\(F_{x}>0\ \). Furthermore, the other parameters such as\(\text{\ τ}_{q}\) and\(\ \tau_{\theta}\) remain constants
(\(\tau_{q}=0.05\) and \(\tau_{\theta}=0.03\)) together with the
fractional parameters \((\alpha=0.75\) and \(\ \ \beta=0.75)\).
Finally, the obtained results are graphically illustrated in the
following figure.