29 total contributions since 2010

Professional Interests: Computational Fluid Dynamics

Posted

labeling contours in pdeplot

I created a contour plot using Matlab's Pde Toolbox command - pdeplot. However, I am not able to label my contours. Is there a w...

3 years ago | 987 views

Responded

Re: pdegrad gives incorrect values at edges

Hi, I understand that this post was created a long time ago but I am facing a similar problem with pdegrad. I am solving a coup...

3 years ago | 1970 views

Posted

fem mesh

Hello, I am trying to mesh a geometry using the initmesh and refinemesh functions. I would like to control the location of node...

3 years ago | 1616 views

Posted

pdegrad and pdeprtni

Hi, After solving for node values using the pde toolbox I use pdegrad to determine the gradient at all element centers and then...

3 years ago | 1287 views

Responded

Re: pde toolbox

Hi Bill, Thanks for the input. I realized that the real reason for the loss in accuracy comes from the 'pdegrad' function. It r...

3 years ago | 4015 views

Responded

Re: pde toolbox

Hi Alan, I did try to jiggle the mesh a few times. Currently, the global convergence rate of my solution is first order. Hence,...

3 years ago | 4015 views

Responded

Re: pde toolbox

Hi Alan, I just saw your message. Thanks for the tip. I have another question for you and Bill. I have got my program to run c...

3 years ago | 4015 views

Responded

Re: pde toolbox

Hi Bill, I think I figured this out. I declared my additional data as global variables. Thanks. Sashankh

3 years ago | 4015 views

Responded

Re: pde toolbox

Hi Bill, I have another question related to the above thread. I am trying to impose the Neumann condition at nodes on the bou...

3 years ago | 4015 views

Responded

Re: pde toolbox

Hi Bill, You suggestion worked out perfectly. Thank you very much. Sai

3 years ago | 4015 views

Responded

Re: pde toolbox

Hi Bill, There is a follow up question to the one listed below. I am using the following method to solve my elliptic problem: ...

3 years ago | 4015 views

Responded

Re: pde toolbox

Hi Bill, Thanks for your reply. In the pde toolbox, under the 'Boundary' option, I used the export decomposed geometry matrix...

3 years ago | 1518 views

Posted

pde toolbox

Hi, [p,e,t] = initmesh(g) and it works fine. However, if I copy the same g matrix from the command space to an .m file and tr...

3 years ago | 1518 views

Responded

Re: pde toolbox

Hi Bill, That was very helpful. Thank you very much. Sai

3 years ago | 4015 views

Responded

Re: PDE Toolbox

Thanks for your help. I guess I will have to write the code myself.

5 years ago | 1698 views

Responded

Re: PDE Toolbox

Yes, this is 2D. The shape is partially rectangular and partially circular.

5 years ago | 1698 views

Responded

Re: PDE Toolbox

Hi Torsten, Thanks for your suggestion. I actually have two domains separated by an interface. I solve for temperature in the f...

5 years ago | 1698 views

Posted

PDE Toolbox

I am using the pde toolbox to solve elliptic pdes for a temperature distribution. I need to fix the temperature at certain nodes...

5 years ago | 1698 views

Responded

Re: micro heat pipe simulation

Hi, I too work on MHPs. Are you trying to simulate the flow field within a MHP?

5 years ago | 2198 views

Posted

pdejmps and errf functions

I need help in using the 'pdejmps' and 'errf' functions in the Matlab PDE Toolbox. I have solved the Elliptic Equation for a giv...

6 years ago | 846 views

Posted

PDE Toolbox

I need some information about the accuracy of this tool. Will it give me node values accurate to 5 significant digits ? Also, wi...

6 years ago | 870 views

Posted

PDE Toolbox

Will it give me correct answers to atleast 5 significant digits? Please let me know more about the accuracy of this tool and als...

6 years ago | 680 views

Responded

Re: Linear Fit on loglog plot

Now I understand what you mean... Thanks John.

6 years ago | 20704 views

Responded

Re: Linear Fit on loglog plot

Hi John, Thanks for your reply.. Yes I made a mistake in saying that the slope would be 2 for the linear fit. Also I agree that...

6 years ago | 20704 views

Posted

Linear Fit on loglog plot

Hi, Consider the example y = x^2, for e.g. x = [1 2 3]; y = [1 4 9]; and plot loglog(x,y). Now if I use linear fit I must get a...

6 years ago | 20704 views