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The upwind scheme is dependent on the _____________

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The upwind scheme is dependent on the _____________

(a) Convection term

(b) Peclet number

(c) Flow direction

(d) Gradient

This question was posed to me by my school principal while I was bunking the class.

Query is from Convection-Diffusion Problems topic in portion Convection-Diffusion Problems of Computational Fluid Dynamics

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Right choice is (c) Flow direction

For explanation: The upwind scheme reflects the physics of advection. The cell-face value is dependent on the upwind nodal value. So, we can say it is dependent on the flow direction and it is suitable for directional flows.

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