Figure 7

(a) Mesh graph of concentration \(w_{1}\) by using the forward Euler numerical scheme for \(h=0.1\), \(\tau =0.15\), \(\eta _{1}=\eta _{2}=0.015\). (b) Mesh graph of concentration \(w_{2}\) by using the forward Euler numerical scheme for \(h=0.1\), \(\tau =0.15\), \(\eta _{1}=\eta _{2}=0.015\). (c) Plot of profile \(w_{1}\) by using the forward Euler numerical scheme for \(h=0.1\), \(\tau =0.15\), \(\eta _{1}=\eta _{2}=0.015\). (d) Plot of profile \(w_{2}\) by using the forward Euler numerical scheme for \(h=0.1\), \(\tau =0.15\), \(\eta _{1}=\eta _{2}=0.015\)