Figure 3From: Unconditional stable numerical techniques for a water-quality model in a non-uniform flow stream The comparison of the exact solution and the new fourth-order scheme at \(\pmb{C(0.5,t)}\) while \(\pmb{(\Delta x=0.2000, \Delta t=0.1000, \frac{\Delta t}{(\Delta x)^{2}} =2.50)}\) and \(\pmb{(\Delta x=0.0100, \Delta t=0.0500, \frac{\Delta t}{(\Delta x)^{2}}=5.00)}\) for all \(\pmb{0\leq t\leq 12.50}\) . Back to article page