Recent content by strokebow

Hi, I am looking to simulate a very - seemingly - simple case. Any advice on a software package would be helpful - preferably gui which doesn't have a steep learning curve. I want to model the heat flux into a sphere from the outside. The dimensions of the sphere are not important to me. I...

Hi Guys, I have an equation I'm trying to work out if it 'Laplaceable'? As in, can I get a transfer function? d2y(t)/dt2 = k⋅cos(Φ)⋅y(t)

Thanks. That very interesting. So are you saying that in any practical case, that is to say a complete circuit, then there will be no electric field generated?

Thanks for replying. Interesting threads. A couple of queries: 1) I've had a read through and am not sure what the assumption is? What is it, and is it reasonable? 2) Do you know of any other textbooks that mention this? Is this a relatively new 'discovery'? Or is it not quite fully understood...

Thanks for responses. Very interesting. I'm a little confused by these responses though. It there a consensus here? Does an electric field exist outside a DC current carrying wire as I originally described? If yes, how significant is it? Would it be deemed negligible for the case I described...

How do you suppose the motion would behave?

Thanks! Good suggestion. So essentially attempt to apply Lorentz force law to this case and I should be able to get an answer. Let's see what it gives...

Hi, Can people please help me with this both qualitatively and quantitatively... 1) If I have a long straight wire carrying a DC current, what field(s) should I expect outside of it? 2)a) If, as an example, I had a stream of charge particles (say electrons), moving perpendicular across the...

TKS how did u come to that conclusion? what was it about the arrangement that allowed u realize there will be no stable orbit?

for rough approx. can i use u = v + at and s = ut + 0.5 *a*t*t a = eE/m where E is from excel collection of cells, m is some constant value. then fot a 1st time step = T, s<x> = x0 * T + 0.5*(eE/m) * T * T or is there a better way? and is there some intuition which can tell u will the motion be...

just thinking that through. i must assume axial position/velocity is constant so each step moves by a certain axial distance and is a specific value of time. from an initial position and velocity <both for x and y> i wud have eE = ma. if i assume some nominal mass also. then at step 1 i have a...

tks its a nice idea to do that with excel. how do u manage to change the cewll colors to follow the magnitude in excel? its nice. how would u then use the information provided from the grid to determine how a test charge might behave moving in the field between the cylinders. cud that be done...

very nice how do u do it. how long did it take to calculate? i never thought of using excel. few questions if u can pls. what is far away and to what potential do u fix it? is it possible that u can share the excel formula with the corresponding theory. that wud be helpful to see how u did it. tks

ok. i thought maybe u had a way of telling. so solving this numerically. for sake of making this easier for me to understand let us just say we only want to solve the potential at 1 point on the grid. i know the poisson equation. how do does someone actually use the poisson equation in...

How can u be so sure that no analytical solution exists. How can u tell Tks