Assuming a convection-diffusion problem where the velocity is in the negative direction (to the left side). Using the upwind scheme:

Question

Answer

the transported quantity at the weastern element's side is affected by the quantity at the weastern node

Answer

the transported quantity at the weastern element's side is affected by the quantity at the central  element's node

Answer

the transported quantity at the eastern element's side is affected by the quantity at the western element's side

Answer

the transported quantity at the eastern element's side is affected by the quantity at the eastern node

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