Recent content by AnneElizabeth

Ignoring the red line, say the blue line is u. But the points on u are unevenly spaced - closer around 0.01 as there is a sudden jump. If I took a simple mean in say MatLab mean(U(Y==0)), this would not account for the fact that the points are unequally spaced. I'm wondering how I would account...

I do have the values of U at each point in the mesh, I just thought because the mesh is unevenly spaced, taking a simple mean of these values would not yield the correct result.

It's mesh nodes along a boundary, where each point has a unique value, u. So I thought the size (physical length) of each section would be important?

If I have three sets of numbers A is numbers between 0 and 0.09 B is numbers between 0.091 and 0.011 C is numbers between 0.011 and 0.1 where the number of elements in A are say, 37, B are 16 and C are 178. So the three arrays have different numbers of points and different distances, plotting...

I mean if I assign a y-value to each of those points, how would I calculate the mean of all the points, as if I just used the simple formula for mean of: (sum of the y-values)/(number of points) it wouldn't take into account that the points are unequally spaced.

Thank you! That's exactly what I wanted! If each of those points have a different value, any chance you know how to calculate the weighted mean of the whole line? Can't figure it out with the spacing between the points.

I want to create an array of numbers between 0 and 0.1 where the points are clustered around an arbitrary point x1 (0 < x1 < 0.1). I want the points to get exponentially closer together near x1 from either side and and get further apart towards the outer limits. I am using MatLab and was trying...

Hi just to let you know you were right about it being an empirical relationship based on observation. According to Kennard it was found through a series of experiments conducted in 1875 by Kundt and Warburg, although it does not go into detail. Some papers cite Navier 1823, although I have not...

Any chance of some guidance on the intuition behind it? I'm having trouble understanding it.

Wondering if someone could link me to a derivation of this formula? It's on the Wikipedia page for the no-slip condition. u - u_wall = β ∂u/∂n β = slip length n = coordinate normal to the wall

Thanks very much for the replies :) Very helpful. And yes I want them to work when both the wet sensor and the dry sensor give a signal simultaneously. :)

Sorry I don't think I explained this very well. What I want is to have one circuit which combines these two circuits: (one wet and one dry), so that there is a wet sensor and a dry sensor in the one circuit, and the circuit will work when the wet sensor is wet and the dry sensor is dry...

Hi, wondering how I could combine a simple wet sensor circuit and a dry sensor circuit into one? The type of wet sensor I'm looking at is like this: and the dry sensor is the same except the sensor and variable resistor switch places. How could I combine the two into one, so that the...

Would the micro switch not be dangerous in the water? (Thanks for all the info btw, it's really helpful)

Thanks I'd never heard of a float switch! I think that might work. I have an adapted a wet sensor circuit (just replace the switch with a float switch) Do you think it would http://i539.photobucket.com/albums/ff356/AnneFTW/WetSensorFloatSwitch.png" ? (this is a model I'm making btw - the pump...