Recent content by MechanicalMan

Hi all, I'm writing a program for a graduate level course that I'm taking wherein I'm solving the Newtonian cooling solution for a long metal rod with specified properties. I have no problem setting up the code and generating a plot, but I am running into problems creating a table of the...

I managed to solve the problem, and after pages and pages of algebra, I have the solution in terms of hyperbolic functions. Thanks for the tips.

Thanks, I did make some typos in the original statement, which is why it may seem off at some points. I did miss the negative root and I did miss the x in the exponent of my original post. I have the boundary conditions, but my only concern is that if I relate the heat transfer by convection at...

I am trying to solve an advanced heat transfer problem and I have a 2nd order ODE. I can solve the homogeneous solution easily, but I am having trouble with the non-homogeneous solution.Homework Statement Given a turbine blade and asked to model as a one-dimensional fin, subject to the...

The vertical axis (y-axis) is considered to be x = 0 (in the cartesian plane). Therefore, any point (x,y) in the second quadrant will have a negative x value and a positive y value. Consult this link here if you require more information: http://en.wikipedia.org/wiki/Cartesian_coordinate_system

What is the problem statement? You can't be just given an equation and asked to solve it. Your question is too ambiguous.

Ask yourself this question, and you'll have answered your own question: For what values of (x,y) is f(x,y) undefined?

My piping systems design textbook says that for a smooth pipe, you can take your roughness e = 0.0015mm. Try that and see what kind of answer you come up with.

Seeing how you don't have velocity or friction factor leads me to believe that this might be an iterative solution. Assume a value of velocity, use that to find your Reynolds, find your friction using the Colebrook equation. Find the diameter. Rinse and repeat until you get some sort of...

It's funny that you ask that question, about whether Civil engineering is easier than other fields. I have a few friends who are in Civil (or "simple" engineering, as we call it) who often complain about the workload. A lot of their courses (from what I hear) are pretty much the same thing...

Do what you were doing in the first attempt, with V = Q/A. Keep in mind that A = (pi/4)*D^2

Well, whenever I'm trying to find how long it would take some to heat up or cool down, I always think of Lumped Systems Analysis, as there is a time rate term in the equations. Essentially, the energy balance breaks down into {Change in Internal Energy During Time Interval dt} = {rate of heat...

Try using Lagrange's equations to solve for the equations of motion. It's a lot simpler to find the equations of motion with Lagrange's equations (providing you don't leave out any of the terms). After you find them using Lagrange's equations, you can put it into a matrix, find the...

Have you studied Lumped Systems Analysis?

Essentially, lift is due to circulation. Circulation will occur in flow over an airfoil because of flow separation, which occurs due to a stagnation point near the back end of the airfoil. Try playing around with this website: http://www.grc.nasa.gov/WWW/K-12/airplane/foilsimu.html. You can...