In which of these ranges is the central differencing scheme used?(a) -2≤Pe≤2(b) -1≤Pe≤1(c) -0.5≤Pe≤0.5(d) -5≤Pe≤5This question was addressed to me by my college professor while I was bunking the class.This interesting question is from Convection-Diffusion Problems in chapter Convection-Diffusion Problems of Computational Fluid Dynamics

In which of these ranges is the central differencing scheme used?(a) -

1.	In which of these ranges is the central differencing scheme used?(a) -2≤Pe≤2(b) -1≤Pe≤1(c) -0.5≤Pe≤0.5(d) -5≤Pe≤5This question was addressed to me by my college professor while I was bunking the class.This interesting question is from Convection-Diffusion Problems in chapter Convection-Diffusion Problems of Computational Fluid Dynamics
Answer» The correct ANSWER is (a) -2≤Pe≤2 For explanation: The CENTRAL differencing SCHEME is valid until the Peclet NUMBER REACHES a value of two. So, in the hybrid difference scheme, in the range -2≤Pe≤2, the central differencing scheme is used.

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