为N =列。*行
警告:迭代循环
一次
与N组的计算列次行。通常是没有利益在一个循环,只遍历一次。
我如何评价矩阵的值?
8视图(30天)
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你好,我想为我班模拟一个散热器,我需要尝试和改变鳍作为变量的数量。我在单独的行数和列数组和我需要的鳍,数组跑在我的方程。的一些方程也有列数为变量所以我需要这些值数组。我相信我需要做一个矩阵的两个数组,但我不确定。任何帮助将不胜感激!
V_wind = 3.398;
ρ= 1.13;
D_c = .002;
μ= 1.89 e-5;
S_c = .002133;
公关= .707;
k_air = .02699;
k = 200;
L_c = . 01;
T_inf = 25;
N_c = 128;
c_p = 1007;
Plate_c = .002;
x = 0;
y = 0;
行= 1:1:25;
列= 1:1:16;
为N =列。*行
S = (.033125-D_c) /(栏1);
R_chip = .00236 / (k * .001325);
R_plate = Plate_c / (k * .00165625);
T_i = 1 * (65 * -100 (R_chip + R_plate));
V_max = (S / (S-D_c)) * V_wind;
R_e =ρ* V_max * D_c /亩;
Nu_D = 0.3 + ((.62 * (R_e ^ (5)) * (Pr ^ (1/3))) / (1 + (。4 / (Pr ^ (2/3)))) ^ .25) * (1 + (R_e / 282000) ^ (5/8)) ^ (4/5);
h = Nu_D * k_air / D_c;
毫升= ((4 * h / (k * D_c)) ^ 5) * L;
n_fin =(双曲正切(mL)) /毫升;
T_o = ((T_i-25) * exp (h -π* D_c * N * /(ρ* V_wind * rows_c * * c_p)) t_i) * 1;
deltaT_LM = ((T_i-25) - (100 - t_o)) /日志(75 / (T_i-T_o));
q = N * h *π* D_c * deltaT_LM * L * n_fin;
x = [x; N];
y = [y; q];
结束
x = x(2:结束);
y = y(2:结束);
情节(x, y)
集(gca),“字形大小”,20)
包含(鳍片的数量,“字形大小”,20)
ylabel (“能量(W)”,“字形大小”,20)
接受的答案
沃尔特·罗伯森
2021年12月10日
V_wind = 3.398;
ρ= 1.13;
D_c = .002;
μ= 1.89 e-5;
S_c = .002133;
公关= .707;
k_air = .02699;
k = 200;
L_c = . 01;
T_inf = 25;
N_c = 128;
c_p = 1007;
Plate_c = .002;
x = 0;
y = 0;
L = L_c;%猜
row_vals = 1:1:25;
column_vals = 1:1:16;
(行、列)= meshgrid (row_vals column_vals);
N =行。*列;
S = (.033125-D_c)。/(栏1);
R_chip = .00236。/ (k * .001325);
R_plate = Plate_c。/ (k * .00165625);
T_i = 1 * (65 * -100 (R_chip + R_plate));
V_max = (s / (S-D_c)) * V_wind;
R_e =ρ。* * D_c V_max。/亩;
Nu_D = 0.3 + ((.62 * (R_e。^ (5))。* (Pr。^ (1/3)))。/ (1 + (.4. / (Pr。^ (2/3)))) ^ .25)。* (1 + (R_e / 282000)。^ (5/8))。^ (4/5);
h = Nu_D。* k_air。/ D_c;
毫升= ((4 * h。/ (k。* D_c)) ^ 0。5)。* L;
n_fin =(双曲正切(mL))。/毫升;
T_o = ((T_i-25)。* exp (N -π* D_c。*。* h。/(ρ* V_wind。* rows_c。*。* c_p)) t_i) * 1;
deltaT_LM = ((T_i-25) - (100 - t_o)。/日志(75。/ (T_i-T_o));
q = N。* h。*π。* * deltaT_LM D_c。* L。* n_fin;
冲浪(行、列、问“edgecolor”,“没有”)
包含(“行号”);
ylabel (“#列”);
zlabel (“能源”);
