Threads Tagged with pde Thread / Thread Starter Last Post Replies Views Forum Hi, I have a system of coupled PDE's as follows: A1 * (f,xx + f,yy) + B1 * (g,xx + g,yy) + C1 * f + D1 * g = 0 ;... Feb22-11 10:01 AM FrankST 0 1,845 Differential Equations http://oi55.tinypic.com/14diu4k.jpg Could someone tell me where to start? I tried separating variables, which got... Feb15-11 08:08 PM hunt_mat 24 1,543 Calculus & Beyond Homework 1. The problem statement, all variables and given/known data See attached PDF. The whole problem is solved, I just... Feb5-11 11:49 PM Abraham 0 1,076 Calculus & Beyond Homework 1. The problem statement, all variables and given/known data The equation is ut + uux + uxxx = 0 I need to show... Feb5-11 01:06 PM hunt_mat 3 836 Calculus & Beyond Homework Dear All, I am trying to solve the following system of PDEs \frac{\partial{A}}{\partial{t}}=... Feb3-11 05:18 PM jmk9 6 1,819 Differential Equations 1. The problem statement, all variables and given/known data Using Green`s function approach, find the solution to... Jan26-11 08:23 PM jacoleen 0 481 Calculus & Beyond Homework I have rather nasty vector partial diff eq which I think has been addressed before; however, when I vistied a few... Dec29-10 03:21 PM tsunamiBTP 0 1,951 Differential Equations Hi, I need some help, looking at a PDE of the form: F'(x) * F(x) + Cte * F(x) = g(x) Cte is a constant... Dec11-10 02:05 PM JJacquelin 3 1,556 Differential Equations Hi, I am trying to solve the 4th order biharmonic PDE with COMSOL. I'm new to COMSOL and I have been able to draw... Nov24-10 05:21 PM simulator 0 2,057 General Engineering Hi there, I am a young mathematician and I have discovered that Dirichlet's boundary problem is ill posed... Anyone... Nov15-10 05:06 PM arildno 1 1,589 Differential Equations Last night in a lecture my professor explained that some partial differential equations are used to observe events on... Oct26-10 04:23 PM octohydra 0 3,240 General Math I was reading on a textbook and came across a step and I had no idea how the author got the next step from it. This... Oct24-10 01:49 PM Wizlem 2 2,616 Calculus a\text{''}+B*a'-A*a==0 a = 10^-9 a' = 0 a = ? The coefficients A and B are variable over time. I HAVE solved... Oct4-10 01:37 AM Simon_Tyler 1 1,412 Differential Equations From Partial Differential Equations: An Introduction, by Walter A. Strauss; Chapter 1.5, no.4 (b). 1. The problem... Sep10-10 12:24 AM ProtonHarvest 2 2,426 Calculus & Beyond Homework I have spent hours and hours trying to solve a problem until reaching a dead point. I don't know how to solve,... Sep5-10 06:07 PM vargasjc 5 1,462 Differential Equations Hello exalted ones. I am working on a set of differential equations for my research and there is one that is becoming... Sep2-10 12:08 AM vargasjc 6 2,242 Differential Equations 1. Determine the equilibrium temperature distribution for a one-dimensional rod composed of two different materials in... Aug31-10 03:13 PM melizzar 0 2,918 Calculus & Beyond Homework 1. The problem statement, all variables and given/known data getting gen sol of xy3zx+x2z2zy=y3z solve... Aug26-10 02:22 PM jackmell 1 1,432 Calculus & Beyond Homework Hello Everyone, I am trying to solve the following nonlinear PDE which is driven from the Hamilton Jacobi Bellman... Aug6-10 09:35 PM mnourian 0 1,191 Differential Equations deleted Jul24-10 07:46 PM Dickfore 2 714 Calculus & Beyond Homework Post removed Jul18-10 01:33 AM brahnema 0 1,609 Differential Equations I need to solve the following system of differential equations: \frac{\partial^2 y}{\partial t^2} + A\frac{\partial... Apr29-10 05:47 AM Woppe 6 6,698 Differential Equations 1. The problem statement, all variables and given/known data I need to find the shock solution for the initial... Apr20-10 10:32 PM lhy56839 0 795 Calculus & Beyond Homework 1. The problem statement, all variables and given/known data I need to find the shock solution for the initial... Apr20-10 09:51 PM lhy56839 0 903 Precalculus Mathematics Homework Dear Mathematicians and Physicists, In light of the coming fall semester, I am having a decision to take a full... Apr2-10 12:17 PM donnylee 0 1,437 Academic Guidance 1. The problem statement, all variables and given/known data I'm given a standard form of Bessel's equation, namely ... Mar27-10 09:36 PM gabbagabbahey 1 3,273 Calculus & Beyond Homework Hi everyone: I am teaching myself transport/programming, and have created a simple program for 1-D... Mar24-10 12:37 AM clustro 1 3,112 Differential Equations 1. The problem statement, all variables and given/known data Consider the Heat Equation： du/dt=k(d2u/dx2), where d is... Mar14-10 04:32 PM LCKurtz 10 2,636 Calculus & Beyond Homework helloo!! i'm trying to find the Green's function for the modified heat equation $u_t = t * grad(u)$ in n... Mar7-10 05:18 PM kikushiyo 1 1,470 Differential Equations regarding 1-d Head Equations on rods. I am aware of how to long a rod with length x=0 to x=L. and initial conditions... Mar1-10 02:33 AM elibj123 4 2,478 Differential Equations this is gonna sound really dumb, but here is my questions anyways: is (u(x,t))2 the same as u2(x,t)? I say yes, but... Feb7-10 05:04 PM foxjwill 1 427 Calculus & Beyond Homework Hi every one, im having a few problems with some research im doing. I put this in the PDE section as it seams related,... Jan22-10 05:10 AM gato_ 3 2,065 Differential Equations Hi I have seen the expression for mass flow rate in one of the problems I am working on. I used to simply apply the... Dec28-09 03:12 AM Madonmaths 2 1,375 Differential Equations 1. The problem statement, all variables and given/known data Solve this differential equation ... Dec19-09 01:00 AM fraggle 2 866 Precalculus Mathematics Homework well, i have a partial differentiation equation that look like this: c_{1}\frac{\partial^{4}u}{\partial... Oct22-09 03:31 AM mariuspop 0 1,335 Differential Equations I'm working on a P.D.E. homework problem and the one part of it my professor gave us a function and wants us to set it... Sep5-09 09:52 PM Feldoh 1 742 Calculus & Beyond Homework Hello! I have difficulty to solve a PDE. I'm trying to simplify the third order eq. into the second order Airy... Jul9-09 10:53 AM ssatonreb 2 1,472 Differential Equations Hello all! So, I'll be taking first-semester quantum mechanics and partial differential equations this fall, and... May23-09 01:49 PM ice109 5 2,406 Science & Math Textbooks Hi everyone, I believe the term Im looking for is phase diagram. For a oscillating system it is a graph where... Mar4-09 11:47 AM djeitnstine 1 3,812 Differential Equations 1. The problem statement, all variables and given/known data Consider a traveling wave u(x,t) =f(x - at) where f is... Mar3-09 04:36 AM yyat 1 3,995 Calculus & Beyond Homework