# I want someone who can help me to see a grid and airfoil in the same plot , here is my code

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Amal Fennich on 18 Mar 2020
Answered: KSSV on 18 Mar 2020
clear all;
close all;
clc;
Mi=0.5;
T=300;
P=1;
gamma = 1.4;
R=287;
vinf = sqrt(gamma*R*T)*Mi;
Nx = 100; % x dimension
Ny = 30; % y dimension
Nxy= Nx*Ny;
% step sizes
dx = 1;
dy = 1;
x = 1:dx:Nx; % x axis
y = 1:dy:Ny; % y axis
%set grid location
for i=
x(i)=single(i-1)*dx;
end
[xx,yy]=meshgrid(x,y); %develop grid based on 2 (x and y) arrays of different size
z=zeros(size(xx)); %generate z as a matrix of zeros (same size as meshgrid)
surf(xx,yy,z); %plots the 3 dimensions as a '2d plot' of meshgrid at z=0
view(1) %changes the 3d default view to a 2d for xy plane
hold on ;
% PLOT ARC
circx= linspace(0,1,40);
circy= sqrt(8.35^2 - (circx-.5).^2)-8.335;
plot(circx, circy) % Draw An Arc
axis([-0.5 1.25 -.1 .1]) % Set Axis Limits
hold off

KSSV on 18 Mar 2020
clear all;
close all;
clc;
Mi=0.5;
T=300;
P=1;
gamma = 1.4;
R=287;
vinf = sqrt(gamma*R*T)*Mi;
Nx = 100; % x dimension
Ny = 30; % y dimension
Nxy= Nx*Ny;
% step sizes
dx = 1;
dy = 1;
x = linspace(0,1,Nx); % x axis
y = linspace(0,1,Ny); % y axis
%set grid location
[xx,yy]=meshgrid(x,y); %develop grid based on 2 (x and y) arrays of different size
z=zeros(size(xx)); %generate z as a matrix of zeros (same size as meshgrid)
pcolor(xx,yy,z); %plots the 3 dimensions as a '2d plot' of meshgrid at z=0
% view(1) %changes the 3d default view to a 2d for xy plane
hold on ;
% PLOT ARC
circx= linspace(0,1,40);
circy= sqrt(8.35^2 - (circx-.5).^2)-8.335;
plot(circx, circy) % Draw An Arc
axis([-0.5 1.25 -.1 .1]) % Set Axis Limits
hold off