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Vista/Abrir - RiuNet

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vv vxvy <br />

x x<br />

C vyvx vyvy<br />

C<br />

W=W<br />

L<br />

+W<br />

N<br />

=-L <br />

i j L<br />

i j<br />

v v <br />

<br />

x <br />

<br />

v v <br />

x<br />

vyvy vyvx C<br />

vxvy vv <br />

x x<br />

C<br />

-N<br />

i j N<br />

i j<br />

v v y v v <br />

y<br />

(2.45)<br />

Podemos simplificar los términos entre paréntesis de tal modo que:<br />

C<br />

W D D<br />

x<br />

x xx xy<br />

C<br />

W D D<br />

x<br />

y yy yx<br />

C<br />

y<br />

C<br />

y<br />

(2.46)<br />

(2.47)<br />

Que, en forma matricial resulta:<br />

W<br />

<br />

W<br />

x<br />

y<br />

<br />

<br />

<br />

D<br />

<br />

D<br />

D<br />

C<br />

<br />

<br />

<br />

<br />

C x <br />

y<br />

<br />

xx xy<br />

i,j <br />

<br />

i,j<br />

yx<br />

D<br />

yy<br />

(2.48)<br />

Si generalizamos para flujo en tres dimensiones, la expresión será similar:<br />

W<br />

<br />

<br />

W<br />

W<br />

x<br />

y<br />

z<br />

<br />

<br />

<br />

<br />

D<br />

<br />

D<br />

D<br />

<br />

<br />

xx<br />

D<br />

D<br />

C<br />

<br />

<br />

<br />

<br />

<br />

C x <br />

<br />

y<br />

<br />

<br />

<br />

C<br />

<br />

z<br />

<br />

yx yy yz<br />

i,j,k <br />

i,j,k<br />

zx<br />

D<br />

xy<br />

zy<br />

D<br />

D<br />

D<br />

xz<br />

zz<br />

(2.49)<br />

Y los distintos coeficientes serán:<br />

D<br />

D<br />

D<br />

D<br />

xx<br />

yy<br />

zz<br />

xy<br />

<br />

<br />

L<br />

L<br />

2<br />

vx<br />

<br />

N<br />

v<br />

2<br />

v<br />

y<br />

<br />

N<br />

v<br />

2<br />

vz<br />

<br />

L<br />

<br />

N<br />

v<br />

D<br />

yx<br />

<br />

<br />

L<br />

2<br />

v<br />

y<br />

<br />

N<br />

v<br />

2<br />

vx<br />

<br />

N<br />

v<br />

v<br />

v<br />

2<br />

z<br />

v<br />

v<br />

2<br />

z<br />

2<br />

v v<br />

x<br />

<br />

N<br />

v v<br />

N<br />

<br />

v<br />

x<br />

v<br />

v<br />

y<br />

2<br />

y<br />

D<br />

D<br />

D<br />

*<br />

*<br />

*<br />

(2.50)<br />

(2.51)<br />

(2.52)<br />

(2.53)<br />

31

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