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gyacomo/matlab/compute/compute_fluxtube_growth_rate.m
7ee703feb0b93D_parallel

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compute_fluxtube_growth_rate.m
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function [ linear_gr ] = compute_fluxtube_growth_rate(DATA, TRANGE, PLOT)
% Remove AA part
if DATA.Nx > 1
ikxnz = abs(DATA.PHI(:,1,1,1)) > 0;
else
ikxnz = abs(DATA.PHI(:,1,1,1)) > -1;
end
ikynz = abs(DATA.PHI(1,:,1,1)) > 0;
phi = DATA.PHI(ikxnz,ikynz,:,:);
t = DATA.Ts3D;
[~,its] = min(abs(t-TRANGE(1)));
[~,ite] = min(abs(t-TRANGE(end)));
w_ky = zeros(sum(ikynz),ite-its);
ce = zeros(sum(ikynz),ite-its);
is = 1;
for it = its+1:ite
phi_n = phi(:,:,:,it);
phi_nm1 = phi(:,:,:,it-1);
dt = t(it)-t(it-1);
ZS = sum(sum(phi_nm1,1),3);
wl = log(phi_n./phi_nm1)/dt;
w_ky(:,is) = sum(sum(wl.*phi_nm1,1),3)./ZS;
for iky = 1:numel(w_ky(:,is))
ce(iky,is) = abs(sum(sum(abs(w_ky(iky,is)-wl(:,iky,:)).^2.*phi_nm1(:,iky,:),1),3)./ZS(:,iky,:));
end
is = is + 1;
end
[kys, Is] = sort(DATA.ky(ikynz));
linear_gr.trange = t(its:ite);
linear_gr.g_ky = real(w_ky(Is,:));
linear_gr.w_ky = imag(w_ky(Is,:));
linear_gr.ce = abs(ce);
linear_gr.ky = kys;
if PLOT >0
figure
plot(linear_gr.ky,linear_gr.g_ky(:,end),'DisplayName','$Re(\omega_{k_y})$'); hold on;
plot(linear_gr.ky,linear_gr.w_ky(:,end),'DisplayName','$Im(\omega_{k_y})$'); hold on;
plot(linear_gr.ky,linear_gr.ce (:,end),'DisplayName','$\epsilon$'); hold on;
xlim([min(linear_gr.ky) max(linear_gr.ky)]);
xlabel('$k_y$');
legend('show');
if PLOT > 1
[YY,XX] = meshgrid(kys,t(its+1:ite));
figure
subplot(311)
% imagesc(t(its:ite),kys,real(w_ky)); set(gca,'YDir','normal');
pclr = pcolor(XX',YY',real(w_ky)); set(pclr, 'edgecolor','none');
xlabel('$t$'); ylabel('$k_y$');
title('Re($\omega$)')
subplot(312)
pclr = pcolor(XX',YY',imag(w_ky)); set(pclr, 'edgecolor','none');
xlabel('$t$'); ylabel('$k_y$');
title('Im($\omega$)')
subplot(313)
pclr = pcolor(XX',YY',abs(w_ky)); set(pclr, 'edgecolor','none');
xlabel('$t$'); ylabel('$k_y$');
title('|$\omega$|')
end
end
end
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