Consider the 2-D incompressible, invisicid Navier-Stokes equation in the horizontal plane. Recall that the momentum equations are simply solving the transport of the velocity on a frozen velocity field. Use a finite volume method on a structured grid numbered i, j with uniform h = 0.3 in x and y, as shown in Fig. 4. Use typical numbering, e.g. ujj refers to the solution for the i-th point in the x-, and j-th point in the y-direction.

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Calculate the x-momentum fluxes for the cell 2, 2. Use the x-momentum convective flux as fx = uu.
Number the cell faces clockwise from k
=
1 representing the interface to cell 2, 3.
Transcribed Image Text:Calculate the x-momentum fluxes for the cell 2, 2. Use the x-momentum convective flux as fx = uu. Number the cell faces clockwise from k = 1 representing the interface to cell 2, 3.
Consider the 2-D incompressible, invisicid Navier-Stokes equation in the horizontal plane. Recall that
the momentum equations are simply solving the transport of the velocity on a frozen velocity field.
Use a finite volume method on a structured grid numbered i, j with uniform h = 0.3 in x and y, as
shown in Fig. 4. Use typical numbering, e.g. uż,¡ refers to the solution for the i-th point in the x-,
and
j-th point in the y-direction.
Ay
i-1,j+1 i,j+1
=
i-1,j
i+1,j+1
X
i,j i+1,j
i-1,j-1 i,j-1 i+1,j-1
Figure 4: Two-dimensional grid with equal spacing.
The fluid has a density of 1000 kg. Use first-order upwinding for the fluxes.
The pressure field of the initial solution is taken as uniform pij 0.
=
Assume that you have computed the first step of the SIMPLE scheme from an initial solution, and the
resulting velocity field u* is given by the components u = [u, v]T with u₁,j 1.1, U2,5 = 1.5, U3,j = 2.5
for all j except cell 2, 2, and ui,1
[2, 0.6] ¹.
0.3, ui,2 = 0.5, Uį,3
=
= 0.8 for all i except cell 2, 2. In cell 2,2 the
velocity is u2,2 =
-
Transcribed Image Text:Consider the 2-D incompressible, invisicid Navier-Stokes equation in the horizontal plane. Recall that the momentum equations are simply solving the transport of the velocity on a frozen velocity field. Use a finite volume method on a structured grid numbered i, j with uniform h = 0.3 in x and y, as shown in Fig. 4. Use typical numbering, e.g. uż,¡ refers to the solution for the i-th point in the x-, and j-th point in the y-direction. Ay i-1,j+1 i,j+1 = i-1,j i+1,j+1 X i,j i+1,j i-1,j-1 i,j-1 i+1,j-1 Figure 4: Two-dimensional grid with equal spacing. The fluid has a density of 1000 kg. Use first-order upwinding for the fluxes. The pressure field of the initial solution is taken as uniform pij 0. = Assume that you have computed the first step of the SIMPLE scheme from an initial solution, and the resulting velocity field u* is given by the components u = [u, v]T with u₁,j 1.1, U2,5 = 1.5, U3,j = 2.5 for all j except cell 2, 2, and ui,1 [2, 0.6] ¹. 0.3, ui,2 = 0.5, Uį,3 = = 0.8 for all i except cell 2, 2. In cell 2,2 the velocity is u2,2 = -
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