Figure 1

(a) Mesh graph of concentration profile \(w_{1}\) for the forward Euler numerical scheme using \(h=0.1\), \(\tau =0.04\), \(\eta _{1}=\eta _{2}=0.008\). (b) Mesh graph of concentration profile \(w_{2}\) for the forward Euler numerical scheme using \(h=0.1\), \(\tau =0.04\), \(\eta _{1}=\eta _{2}=0.008\). (c) Plot of concentration profile \(w_{1}\) for the forward Euler numerical scheme using \(h=0.1\), \(\tau =0.04\), \(\eta _{1}=\eta _{2}=0.008\). (d) Plot of concentration profile \(w_{2}\) for the forward Euler numerical scheme using \(h=0.1\), \(\tau =0.04\), \(\eta _{1}=\eta _{2}=0.008\)