Plotting a fluid field on a grid

Hi, quite new to Matlab.

I have an assignment to draw 2D fluid fields on a grid.

I have the following mathematical functions of a sea wave:

eta (x,t) - surface function

u (x,z,t) - horizontal component of the water particles velocity

w (x,z,t) - vertical component of the water particles velocity

a_x (x,z,t) - horizontal component of the water particles acceleration

a_z (x,z,t) - vertical component of the water particles acceleration

tseta (x,z,t) - horizontal ordinate of the particles displacement

epsilon(x,z,t) - vertical ordinate of the particles displacement

I have been able to draw these functions and run an animation in respect to time.

What I'm required to do now is to draw for each of these a 2D fluid field on a grid, so that the z axis goes from the seabed (z=h, h is given) up to one wavelength under the sea surface (wavelength is given).

I have been trying to do this with "quiver" but I keep getting results which are not logical.

Any help is appreciated.

Thanks.

[darova]

Please attach the data and code

[Anton Dor]

The code is attached

[darova]

Whoa, didn't expect that. Can you make a simplified example or something?

[Anton Dor]

This has been my attemp at doing it for u. But I don't know how to do a grid, how to run the vector field up to one wavelength from the sea surface and the results that I'm getting are not logical.

% Horizontal velocity - u

subplot(4,4,2);

u=((pi*2*a)/T)*exp(k*z)*cos(teta);

plot(x,u,'-r',x,0);

set(gca,'Fontsize',8);

title('u - Horizontal Velocity'); ylabel('u [m/s]'); xlabel('x [m]');

axis([ 0 limit_x min(u) max(u) ]);

% Horizontal velocity vector field

subplot(4,4,6);

u_grid=size(u);

u_grid=[1:u_grid(1,2)];

u_scaling=round(u_grid(1,2)*(lambda/10));

quiver(u(1:u_scaling:end),u_grid(1:u_scaling:end),'-r');

title('Horizontal Velocity Vector Field'); ylabel('z [m]'); xlabel('x [m]');

[darova]

Use this

[Anton Dor]

What is the name of this command? I can't find it.

I have Matlab R2020a

[darova]

I mean use code button for code inserting

I still don't understand your question. You attached samle code but i can't run it

[Anton Dor]

I don't understand.

I've uploaded the entire code, can you run it?