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Algoritmi II · software · inquinamento aria

Flussi di slancio e la sostenibilità:

            (Briggs, 1975, p. 63):

F_b=gv_sd_s²(DT/4T_s)    (7)

 DT = T_s - T_a, T_s

F_m=gv_s²d_s²(T_a/4T_s)    (8)

F_b<55,

            (DT)_c=0.0297 T_s(v_s/d_s²)^1/3         (9)

F_b > 55,

            (DT)_c=0.00575 T_s(v_s²/d_s)^1/3         (10)

F_b < 55:

            x_f=49F_b^5/8       (11)

F_b > 55:

            x_f=119F_b^2/5      (12)

l(Briggs, 1971, p. 1031), F_b < 55:

h_e=h_s+(21.425 F_b^3/4/u_s)     (13)

F_b > 55:

h_e=h_s+(38.71 F_b^3/5/u_s)        (14)

(Briggs, 1969, p. 59):

h_e=h_s+3d_s(v_s/u_s)    (15)

 (Briggs, 1971, p. 1031):

s=g[(dT/dz)/T_a]         (16)

Briggs (1975, p. 96):

            (DT)_c=0.019582 T_s v_s s^1/2       (17)

Briggs, (1975), p. 96:

x_f=2.0715 u_s s^-1/2        (18) 

(Briggs, 1975, p. 96):

h_e=h_s+2.6 [F_b/(u_ss)]^1/3        (19)

Briggs, (1969), p. 59:

h_e=h_s+1.5[F_m/(u_ss^1/2)]^1/3       (20)

Briggs (1972), p. 1030:

h_e=h_s+1.60 [(F_b x²)^1/3/u_s]       (21)

(Bowers, et al, 1979)

a) instabile:

h_e=h_s+[3F_mx/(bet_j²u_s²)]^1/3      (22)

x_max=4d_s(v_s+3u_s)/(v_su_s)     para F_b=0                (23)

x_max=49 F_b^5/8              para 0 < F_b < 55 m²s³        (24)

x_max=119 F_b^2/5             para F_b > 55 m²s³       (25)

b) stabile:

h_e=h_s+(3F_m)^1/3{sin[x s^1/2/u_s]}^1/3[bet_j²u_ss^1/2]^-1/3  (26)

x_max=0.5 pi u_s/s^1/2               (27)

bet_j=(1/3)+(u_s/v_s)       (28)