To define a porous, prescribed velocity for each space direction (x, y, and z for 3D), select one or all of the Prescribed in x direction, Prescribed in y direction, and Prescribed in z direction check boxes. Then enter a value or expression for the components vx, vy, and vz (SI unit: m/s).
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For 2D axisymmetric components and to define a prescribed velocity for each space direction (r and z), select one or both of the Prescribed in r direction and Prescribed in z direction check boxes. Then enter a value or expression for vr and vz (SI unit: m/s).
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