User Portlet
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| I am learning how to use Mathematica to solve PDEs. As a learning activity I put together the attached notebook to solve the heat equation for an annular space that contains heating/cooling tubes. At this point I am only implementing Dirichlet... |
| Working with NDSolve trying to define a boundary condition that is a function of time. I did this using a piecewise definition in a DirichletCondition statement. But when I run NDSolve it says the statement can not be parsed and is ignored. Is... |
| Working with the pde numeric solvers. If I use a statement like: sol = NDSolveValue[{op == 0, pbc, Subscript[\[CapitalGamma], Dc]}, u, {x, y} \[Element] \[CapitalOmega]] I will get back an interpolating function and I can do... |
| Thanks that is exactly what I was looking for. |
| I found a work around. Solve[{Log[D1[Q, 900 + 273.15, D0, 9.62*10^-5]] == Log[1.3*10^-13], Log[D1[Q, 650 + 273.15, D0, 9.62*10^-5]] == Log[5.5*10^-16]}] Output is correct: {{D0 -> 0.0000756184, Q -> 2.27762}} I would... |
| Thank you thank you thank you...... |
| I am trying to modify the following recursive function. EX[n_] := EX[n] = EX[n - 1]*x^n EX[1] := x This code works and provides output such as. In[194]:= EX[7] Out[194]= x^28 What I would like is a function that... |
| I am very new to this so a simple explanation would be helpful. using some of the mathematica tutorials I have learned to define functions using the notation p[x, y] := xy. However, in further reading and looking at the documentation I have found... |