I want to calculate the airflow between zones. So the velocity and current cell area are need to know,how can I get it? thanks.

Try http://htex.mpei.ac.ru/~krinitsky/index1.html software. Load PHI file, enter to analyze mode and click mouse button on cell and you see velocity value and X,Y,Z cell size.

i mean,i want to calculate the airflow in ground.for. so i wonder whether there are any symbol used to represent the area of current cell(or the x,y,z extent of current cell)?

Hi cloudz,

If you wish to access the EAST face (say) of all cells -

get the 0-location index by

l0a = L0B(ASURFE)

loop on the range of indices (e.g., ix1<= ix <=ix2, etc.), and retrieve the area fro the F array by:

do izz = iz1,iz2

jz = Nx*Ny*(izz-1)

do ix = ix1,ix2

do iy = iy1,iy2

icell = iy + Ny*(ix-1)

area = F(l0a + icell + jz)

enddo ! iy

enddo ! ix

enddo ! izz

Note, that part of the above variables (e.g., Nx, Ny etc.) are passed in commons included in some of d_includ/ folder.

I hope this helps. Rami

Rami,thank you very much. Can you explain more detailedly,what's the function L0B(ASURFE) meaning? I've looked for the polis,but just find the L0F(variable name) function subroutine.

See explanation in POLIS encyclopaedia, entry F-ARRAY of EARTH, (k) Block-location Indices (LB's); BFC Geometrical Quantities, file:/phoenics/d_polis/d_enc/enc_fa11.htm