1 | !-------------------------------------------------------------------------- |
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2 | !---------------------------- caldyn_solver ---------------------------------- |
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3 | ! |
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4 | ! Compute pressure (pres) and Exner function (pk) |
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5 | ! kappa = R/Cp |
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6 | ! 1-kappa = Cv/Cp |
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7 | ! Cp/Cv = 1/(1-kappa) |
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8 | gamma = 1./(1.-kappa) |
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9 | vreff = Rd*Treff/preff ! reference specific volume |
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10 | Cvd = 1./(cpp-Rd) |
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11 | Rd_preff = kappa*cpp/preff |
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12 | DO l = ll_begin, ll_end |
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13 | !DIR$ SIMD |
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14 | DO ij=ij_begin_ext, ij_end_ext |
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15 | SELECT CASE(caldyn_thermo) |
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16 | CASE(thermo_theta) |
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17 | rho_ij = 1./(geopot(ij,l+1)-geopot(ij,l)) |
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18 | rho_ij = rho_ij*g*rhodz(ij,l) |
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19 | X_ij = Rd_preff*theta(ij,l,1)*rho_ij |
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20 | ! kappa.theta.rho = p/exner |
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21 | ! => X = (p/p0)/(exner/Cp) |
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22 | ! = (p/p0)^(1-kappa) |
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23 | pres(ij,l) = preff*(X_ij**gamma) ! pressure |
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24 | ! Compute Exner function (needed by compute_caldyn_fast) |
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25 | ! other formulae possible if exponentiation is slow |
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26 | pk(ij,l) = cpp*((pres(ij,l)/preff)**kappa) ! Exner |
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27 | CASE(thermo_entropy) |
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28 | rho_ij = 1./(geopot(ij,l+1)-geopot(ij,l)) |
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29 | rho_ij = rho_ij*g*rhodz(ij,l) |
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30 | T_ij = Treff*exp( (theta(ij,l,1)+Rd*log(vreff*rho_ij))*Cvd ) |
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31 | pres(ij,l) = rho_ij*Rd*T_ij |
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32 | pk(ij,l) = T_ij |
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33 | CASE DEFAULT |
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34 | STOP |
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35 | END SELECT |
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36 | END DO |
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37 | END DO |
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38 | ! We need a barrier here because we compute pres above and do a vertical difference below |
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39 | !$OMP BARRIER |
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40 | IF (ll_begin==1) THEN |
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41 | !DIR$ SIMD |
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42 | DO ij=ij_begin_ext, ij_end_ext |
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43 | ! Lower BC |
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44 | dW(ij,1) = (1./g)*(pbot-rho_bot*(geopot(ij,1)-PHI_BOT(ij))-pres(ij,1)) - m_il(ij,1) |
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45 | W(ij,1) = W(ij,1)+tau*dW(ij,1) ! update W |
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46 | dPhi(ij,1) = g*g*W(ij,1)/m_il(ij,1) |
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47 | END DO |
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48 | END IF |
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49 | DO l = ll_beginp1, ll_end |
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50 | !DIR$ SIMD |
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51 | DO ij=ij_begin_ext, ij_end_ext |
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52 | dW(ij,l) = (1./g)*(pres(ij,l-1)-pres(ij,l)) - m_il(ij,l) |
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53 | W(ij,l) = W(ij,l)+tau*dW(ij,l) ! update W |
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54 | dPhi(ij,l) = g*g*W(ij,l)/m_il(ij,l) |
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55 | END DO |
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56 | END DO |
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57 | IF(ll_endp1==llm+1) THEN |
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58 | !DIR$ SIMD |
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59 | DO ij=ij_begin_ext, ij_end_ext |
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60 | ! Top BC |
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61 | dW(ij,llm+1) = (1./g)*(pres(ij,llm+1 -1)-ptop) - m_il(ij,llm+1) |
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62 | W(ij,llm+1) = W(ij,llm+1)+tau*dW(ij,llm+1) ! update W |
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63 | dPhi(ij,llm+1) = g*g*W(ij,llm+1)/m_il(ij,llm+1) |
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64 | END DO |
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65 | END IF |
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66 | ! We need a barrier here because we update W above and do a vertical average below |
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67 | !$OMP BARRIER |
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68 | DO l = ll_begin, ll_end |
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69 | !DIR$ SIMD |
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70 | DO ij=ij_begin_ext, ij_end_ext |
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71 | ! compute du = -0.5*g^2.grad(w^2) |
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72 | berni(ij,l) = (-.25*g*g)*((W(ij,l)/m_il(ij,l))**2 + (W(ij,l+1)/m_il(ij,l+1))**2 ) |
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73 | END DO |
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74 | END DO |
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75 | DO l = ll_begin, ll_end |
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76 | !DIR$ SIMD |
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77 | DO ij=ij_begin_ext, ij_end_ext |
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78 | du(ij+u_right,l) = ne_right*(berni(ij,l)-berni(ij+t_right,l)) |
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79 | du(ij+u_lup,l) = ne_lup*(berni(ij,l)-berni(ij+t_lup,l)) |
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80 | du(ij+u_ldown,l) = ne_ldown*(berni(ij,l)-berni(ij+t_ldown,l)) |
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81 | END DO |
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82 | END DO |
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83 | !---------------------------- caldyn_solver ---------------------------------- |
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84 | !-------------------------------------------------------------------------- |
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