Recent content by Riverbirdy

  1. Riverbirdy

    Finite difference Method of Wave Equation

    Yep, probably he had some mistakes on the units, I guess. But, this type of homework is worth to learn than any regular straight forward one. Probably, its deliberately mistaken. I so appreciate your help. Thank you so much.:smile:
  2. Riverbirdy

    Thermal energy problem: Gas expansion in cylinder

    Considering the process is adiabatic(ideally insulated q=0, no heat transfer involved in the process), use PVk=const or P1V1k=P2V2k k is just the heat capacity ratio of the gas given k=Cp/Cv
  3. Riverbirdy

    Finite difference Method of Wave Equation

    Here's the program results running at Δt=1500 sec at t=10,000 sec
  4. Riverbirdy

    Finite difference Method of Wave Equation

    Nope, I think not necessarily. Minimizing time step would actually make CFL→0 which is off 0.7071 value. The book says at those values far from 0.7071 solution tends to diverge. Now, if I tend to maintain CFL of 0.7071 I have a time step of actually, 1400 plus seconds.
  5. Riverbirdy

    Finite difference Method of Wave Equation

    CFL for this one is about 5E-5. I tried in matlab, results seems to diverge. My professor might be deliberately giving off problem like this to develop critical thinking. I don't know might be his mistake probably
  6. Riverbirdy

    Finite difference Method of Wave Equation

    CFL= c Δt/Δx, the Courant–Friedrichs–Lewy (CFL) condition where c- wave propagation constant, Δt & Δx are time step and step size
  7. Riverbirdy

    Finite difference Method of Wave Equation

    Ok, got it. Thank you so much I appreciate it. Anyhow, I computed for the CFL=5.0E-5 which is recommended to be at least 0.7071. What can you say about this wave?
  8. Riverbirdy

    Predicting precipitates in a solution

    So nice to find you here:smile:.-msu-iit
  9. Riverbirdy

    Predicting precipitates in a solution

    If it has to be long term, then it's a factor of gravity, heavy molecules settles lighter ones float.:cry: mao ba kabs?
  10. Riverbirdy

    Finite difference Method of Wave Equation

    So you mean to say at u(0,0,0)=0.01 is the source located?
  11. Riverbirdy

    Predicting precipitates in a solution

    It would somehow end up to proximity of molecules and foremost opposite ions. Just a mere guess.
  12. Riverbirdy

    Predicting precipitates in a solution

    May be isolating one over the other specie (1 to 1) might help you somehow to analyse the problem at a fixed temperature. Does temperature change during the mixing of constituents? I don't know, if its an experiment your doing, you have no worries at all. As nature dictates what's going to...
  13. Riverbirdy

    Predicting precipitates in a solution

    Electronegativity difference perhaps? Sakto ba? Pagtawas oi.?:) This is a topic on chemical kinetics. Rate of reaction.
  14. Riverbirdy

    Finite difference Method of Wave Equation

    Hi, Physics forum! Just a little push of my doubts I hope somebody could help me with my confusion of one of our home works. I know that all boundary conditions are zero. My doubt is how do I interpret (x,y,0)=0.01 source in the figure? Where is it located in the grid. I am hoping someone...
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