Transient Definition and 170 Threads

y Could some one please help me. My professor for a lower level programming class (in labview) has given the class the following assignment. This is not a heat transfer class and he has not spoken/taugh us anything related to heat transfer. He emailed us a few pages from a heat transfer...

Homework Statement I am working on a Matlab code that will solve a temperature grid for a 2D transient heat transfer problem. The code seemed to be working well but when I changed the timestep (to find timestep independance) I noticed that the larger the timestep, over the same duration, the...

i was trying to solve this question(file attached), but i can only come up with the answer: i assumed iL=0 at t=0, hence arrived at this: IL(t) = 6mA(1 - exp(-100000t)) i can't figure out how Io came about. can someone come it my rescue and tell me how the I0 came into play. Kind...

Hello I am trying to better understand transient fluid dynamics in pipes. First, I am attempting what I believe should be relatively simple problem. I have a constant area horizontal pipe partially filled with a stationary incompressible inviscid fluid. The part of the pipe that is filled is...

hello..can anyone help me? i have the figure in the attachement, and i need to determine the final output value and the rise time..can first anyone explain to me what do we mean by output value and rise time..then what is the formula to calculate them?or we must use MATLAB commands to do it...

I am currently just running a normal 3D incompressible flow problem in COMSOL 3, and end up with the following error: Error: Time 0: Error in residual computation: The_relative_error_is_greater_than_the_relative_tolerance For the direct solver. Last time step is not...

Homework Statement http://i.thespiffylife.com/files/1/trans1.jpg i have to find Vc(t) Homework Equations I know that Vc(0+) = Vc(0) = Vc(0-) and Vc = Vs*e^(-t/RC) The Attempt at a Solution What I'm unsure on is what the equivalent resistance of the circuit would be so I could find the...

Can anyone explain to me the meaning of the terms : Electrical Fast Transisient (EFT)? Thanks

I'm looking at project investigating thermal dissiplation around circular and square concrete piles, resting in a homogeneous material (soil) using two-dimensional finite element analysis. I'm applying a transient thermal loading cycle to the centre of the concrete pile over a 7-day test...

At the moment I'n involved with a project that is using the S3K transient analysis code. I was wondering if anyone knows of a different code that will perform transient neutronic operations. Thanks in advance

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...

Hello. Suppose we have a MOS capacitor (n-substrate). When we give negative voltage the majority carrier (electrons) are repelled from the oxide-substrate interface and move towards the bulk. Say the bias is -0.3 volts. The substrate is depleted and in steady-state. Suddenly if the bias...

Homework Statement My problem is not necessarily the 2D problem, it's getting the answer in one dimension (I have the y-direction). The problem is the boundary conditions...anyways. Solve for the temperature of a 1D transient metal bar, with the following boundary conditions. Imposed...

Let's say I have a box, mounted to a plate in a vacuum (pure conduction). The system is initially at a steady state at temperature Ti. The plate then begins cooling at a rate of 3 C/min. The box is going to cool at some rate, and with some time constant. For this test, I have place a...

I'm having serious trouble understanding how to solve this problem using the differential equation method ( I MUST use this method). I provided the answer but my solution attempts are not producing the same result. Here is the problem...

Please click the image to make it larger: http://img360.imageshack.us/img360/2049/82009866sy5.th.jpg To solve this circuit I'm going to use the differential equation approach. I'm concerned with the voltage across the capacitor at V_c(0^-) and V_c(0^+) At position 1 before the switch...

hi i want MATLAB coding for transient 2D Thermal problem pls help

Hey I think I'm missing something fundamental in this problem. The problem reads: a 1 m3 tank initially contains air at 300 kPa, 300K. The air slowly escapes until the pressure drops to 100 kPa, via a process where pv1.2=constant (v being specific volume) Find the heat transfer for a...

http://www.planetfusion.co.uk/~pignut/tlp.html also see http://www.guardian.co.uk/life/farout/story/0,13028,1315487,00.html When I saw this I thought about the Astronaut who while orbiting the moon saw a flashing light on the dark side. He reported the light and was told to watch on the...

http://news.nationalgeographic.com/news/2003/06/0625_030625_atmospherethunder.html