1.

Consider the stencil. Give the advection flux at face e \((\dot{m_e}\phi_E)\) using the upwind scheme.(Note: \(\dot{m}\) and Φ are the mass flow rate and the flow variable respectively).

A. \(\dot{m_e}\phi_E=max⁡(\dot{m_e},0)\phi_C-max⁡(-\dot{m_e},0)\phi_E\)
B. \(\dot{m_e}\phi_E=min⁡(\dot{m_e},0)\phi_C-max⁡(-\dot{m_e},0)\phi_E\)
C. \(\dot{m_e}\phi_E=max⁡(\dot{m_e},0)\phi_C-min⁡(-\dot{m_e},0)\phi_E\)
D. \(\dot{m_e}\phi_E=min⁡(\dot{m_e},0)\phi_C-min⁡(-\dot{m_e},0)\phi_E\)
Answer» B. \(\dot{m_e}\phi_E=min⁡(\dot{m_e},0)\phi_C-max⁡(-\dot{m_e},0)\phi_E\)


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