# Homework Help: Pathline and Streamline problem

1. Jul 27, 2016

### Abigail1997

1. The problem statement, all variables and given/known data
As above

2. Relevant equations
Not sure.

3. The attempt at a solution
I've only ever seen one of these problems and it was in the form of V=Axi-Ayj, so much simpler and even then it was poorly explained by the lecturer. I understand what a velocity field is but not much more.

2. Jul 27, 2016

### BvU

Hi, Abigail,

Try A=0 to get started. The velocity vector at point $(1,1)$ is ?

3. Jul 29, 2016

### BvU

first paragraph counts as an attempt at solution, I would say. (Choosing C as parameter is unfortunate, though, if the problem statement already has a C.)
Can't guess what u and v are; the components of $\vec v$ ?
You found the streamlines at t =0 from $\vec v = Bx\hat\imath + Cy\hat\jmath$
Aren't the streamlines for t=1 given by simply substituting t=1 and doing the same thing ?

4. Jul 29, 2016

### Abigail1997

Yeah I realised that and changed it to D :) correct, u and v represent the x and y components of V. As for the subbing in t=1, thats what I thought but I cannot seem to get the correct answer (e^3/2) but I'm probably making a silly mistake somewhere and just can't see it

5. Jul 30, 2016

### BvU

Check the non-moving dashes in the first picture here (watch out for headaches).
These dashes at fixed grid points you can draw for t=1 in your exercise. They should suggest the $e^{3\over 2}$