Recent content by Link-

Bump... Any idea?

I had solve this problem increasing the mesh size on the areas that are not of significance on the model. Also, maybe is due to the time step you are using, if it is a transient analysis.

Hey guys I need a little help trying to identify or getting a good conclusion of what kind of aluminum I have here. These aluminum was grind and finally polished with aluminum oxide of 3 microns. After the etching of the alloy with Keller's Reagent for a couple of seconds we took the...

Thanks a lot Hootenanny.

I'm trying to solve a basic heat equation \frac{\partial T}{\partial t}=\alpha \frac{\partial^2 T}{\partial x^2} I manage to get T=X(x)\tau(t) Then \tau(t)=A*e^{-\alpha*\lambda^2*t} and X(x)=C*sin(\lambda x) where \lambda=\pi/Ln n=1,2,3,... From here I don't know how or why I get to a...

Thanks a lot for the help and info.

Hi guys... Here's the problem. I want to plot a Temperature T(x,y) profile across a plate with dimensions L x W. I'm using finite difference method so the temperature are only known at the nodes I choose, if I make n nodes across the Length and m nodes across the Width I will end up with an...

Yes, T=T(x,t) T(x,0)=200*x for 0<=x<=.5L (symetric at 0.5L) T(0,t)=0 T(L,t)=0 No, not separation of variables.. The problem was that I was using the finite difference method to find the temperature profile in the wall at different times and I had two equations for the problem but I didn't...

I am a little confuse here. I am trying to solve the 1-D Transient Heat Transfer for a Constant Temp. Surfaces "wall". The PDE is \frac{\partial T}{\partial t}=\alpha \frac{\partial ^2 T}{\partial x^2} T(to)=200*x I am not so sure about how I'm suppose to get the Temperature profile any...

Portuguese sound a little bit like spanish. If you know spanish really well and hear a portuguese conversation, you can understand part of the conversation. What I would say is sound nicest is the portuguese accent.

Hi, I have a couple of questions, I bought a computer a week ago and I thought ( ignorance) that if the processor can manage 64-bit I would have a 64-bit computer, later I noticed that I was wrong. I need a 64-bit OS a BIOS and a couple of other things. But while I was doing my research on...

I wrote a user-defined function in MATLAB that is supposed to take the derivative of a function f(x) in the point that correspond to (x,f(x)). Here's the code function [fprime]=numderivative(f,x,h,tol) hd=h*10^-1; hh=h; hhdd=hd; itnum=numel(x); error=tol+1; for ii=1:itnum while...

Optrix, here's a link of the modified bernoulli equation: http://www.engineersedge.com/fluid_flow/extended_bernoulli.htm"

Yes there is a modified Bernoulli Equation. But you can't expand the "simple" Bernoulli's Equation into the modified version. The way to get into the modified bernoullis eq is to drop a couple of assumptions, like invicid and uniform flow. This modified equation includes losses from fiction...

You can develop bernoulli's equation from the first law of thermodynamics and Newtons second law. (maybe there are more) If you develop this equation by yourself you will notice that to get to Bernoulli's Equation you need to make to many assumptions, like no shear, incompressible and steady...