- #1
wahaj
- 156
- 2
I am working on a fluid mechanics problem that has a parabolic gate with equation
[tex] y = x^2 [/tex]
To solve the problem I need two vectors namely [itex] \vec{r} \ and \ \hat{n} [/itex]. Assuming origin is at x = 0, the vector [itex] \vec{r} [/itex] is a vector corresponding to each point on the parabola. I calculated that to be [itex] \vec{r} = x \hat{i} + x^2 \hat{j} [/itex]. [itex] \hat{n} [/itex] is a unit vector normal to the parabola projecting into the fluid. I can find the unit normal at a point but how would I go about finding the unit normal at every point on the parabola. The parabolic gate lies in the first quadrant and the fluid lies to the left of the gate (it comes in from the second quadrant). The range for the gate is [0,2.5].
[tex] y = x^2 [/tex]
To solve the problem I need two vectors namely [itex] \vec{r} \ and \ \hat{n} [/itex]. Assuming origin is at x = 0, the vector [itex] \vec{r} [/itex] is a vector corresponding to each point on the parabola. I calculated that to be [itex] \vec{r} = x \hat{i} + x^2 \hat{j} [/itex]. [itex] \hat{n} [/itex] is a unit vector normal to the parabola projecting into the fluid. I can find the unit normal at a point but how would I go about finding the unit normal at every point on the parabola. The parabolic gate lies in the first quadrant and the fluid lies to the left of the gate (it comes in from the second quadrant). The range for the gate is [0,2.5].