A related update on this.
Following the Nielsen model, when I decrease the maximum packing fraction of the filler particles in the composite, the calculated thermal conductivity increases. To me, this was surprising, as I expected that a higher packing fraction (of a particle with significantly...
Oh, and if anyone has any idea where I can find the original derivations for the equations in the Lewis-Nielson, or Halping-Tsai equations, I would sincerely appreciate it.
I have been using Nielsen's book "Mechanical Properties of Polymers and Composites" for a lot of my research, but Nielsen...
Hi,
Sorry for the semi-book here
I am working on a project where I am mixing h-BN nanoparticles into a polymer resin to try to tailor the thermal conductivity and dielectric strength of the resulting composite.
Admittedly I am not very well versed when it comes to materials science...
Before I ask the question, let me explain a little bit about myself. I graduated just over a year ago with a bachelors in Physics, and am now starting my first semester of grad school in Energy Engineering. I have been out of practice, and am facing major struggles getting back into my...
Never mind, Vela, you're amazing and awesome, and I really appreciate all the help you've given me. You answer just about every question I ask, and for that I thank you. I totally just woke up, and now things are making sense again. I think I need a short break.
Most definitely, but forgive my lack of understanding at 1:00am , but is there a physical explanation, or is this just one of those things that is only mathematical?
so I'm left only with -z[y,Py] huh?
I've worked it out a few times, and if I remember correctly [y,Pz] clearly vanishes when operating on some form of dummy function, but without actually working it out, can you explain briefly why exactly it vanishes?
Thank you both. I was able to solve that problem, I have moved forward in this problem and am stuck on the [r^2, Lx] portion. I know that the x[x,Lx] + [x,Lx]x = 0 and that I'm left with the y and z terms, but I'm having trouble with those. Do you have any suggestions towards that approach...
Ok, never mind, I figured out what was going on. Thank you all very much for your help. After following what was going on, I've successfully solved four of my five assignments! I'll post what I did later on tonight when I've got the time, so if other people have a similar question, they have a...
Alright, so I performed the operations and got <x> = 0 and <p> = 0. Two other students I spoke with said that they got <p> = 0 but not <x>. Am I making another mistake here?
"Though it doesn't make a difference." Why do you say this vela? Is it because of the orthogonality and cancellation if you end up multiplying through after the operations?