Recent content by spl3001

Honestly, it's just for fun, haha. I like physics, programming, and using those first two interests to make little simulations. Heat flow and fluid flow have interested me, but I can't afford some of the CFD and FEA software packages, nor do I desire the accuracy and power that they provide...

Yes, 8 nearest neighbors, with the 4 diagonal ones weighted as less conductive as the other 4. The initial conditions are basically the temperature (or energy content: heat) of the elements specified. One example I've been using a square grid with the center square at a high temperature. The...

The setup is as follows: The environment is divided into a rectangular grid of squares of any size (m x n). Each square can exchange heat with any of the 8 neighboring squares. The 4 left, right, up and down of a given square element have a heat exchange weight of 1.0. The diagonal squares...

Well let's go with conduction then. I'd be interested in seeing the steps to deriving the formula as well.

Yes, just radiative. I feel including conduction will be...complicated. Though one or the other only would be great.

I'm trying to write a very, very simple heat flow simulation program. The idea is an environment space is a grid, with each grid space identical in respect to all other grid spaces (I'm calling a grid space an "element") except temperature. So, they are physically the same except temperature...

I think the second thought experiment expresses what I envisioned more clearly. Sorry about that.

I'm not sure what the difference is between global and local conservation laws, but since CTCs don't have global conservation laws, would that allow this instantaneous build up? And does the following re explanation make sense: Year 2050: generate traversable wormhole. Start moving one...

Imagine the following experiment: Scientists have made a machine that can create a traversable wormhole and can also accelerate one end at near the speed of light and bring it back. A time machine. Suppose the dilation between the two ends is 10 years. As soon as the experiment brings...

This is kind of a specific question relating to an experiment I'd like to setup. I have an old thermos, and I thought it would be interesting to see how efficient it is at insulating its contents. I did an ad hoc experiment using boiling water and a candy thermometer, but I only sampled the...

I'm designing a program that simulates collisions in 2 dimensions, among other things. The collisions are between 2 circles, the collisions themselves are perfectly elastic. The mass of the two circles are known, and their X and Y velocity components are known. They also have specific radii...

I would just like to thank everyone for their suggestions and ideas. It all came together and I was able to solve for the velocity and distance. Results are here: http://www.gobean.com/sww_35.htm

That might be able to give me the speed. That's the orbital velocity of an object in an elliptical orbit. I need to know the semi major axis of an orbit with a period of 8 days in which its perigee point is in contact with the Earth's surface. I believe I'm getting pretty close now.

I just need it to land on earth. A straight line up and down would be fine, even a few hundred meters away is ok. I don't really need to figure an gravitational influences from other planets/moons/the sun, and the Earth can be assumed to be at rest. All i need is the initial velocity and the...

Now that I have a distance dependent acceleration, how do I incorporate that into a formula involving time such as v(t) = v_0 + \frac{1}{2} a t^2?