Recent content by Ein Krieger

Hello, I was observing the solution of the following problem below: Below it says that reducing the cross-sectional area of the wire triples its length. However, according to cross-sectional area equation A=pi*r^2 we observe that reduction of area only leads to reduction of radius ...

be cause it is a rule for all rectangles?

Homework Statement A quadrant contains an inscribed rectangle ABCD. Given the distance marked: CD=3m , what is length of AD? Homework Equations Area of circle = pi*r^2 Pythagorean 's theorem : a^2=b^2+c^2 The Attempt at a Solution We can draw diagonal from C to B similar to...

Thanks for explanation, but I couldn't access the link you posted below. Is there any other viable sources about that topic?

Hey, Can you please tell which topic is related to the solution of the following problem. I first would like to try it and , if I get stuck, I will ask for help. http://s019.radikal.ru/i611/1306/c7/a3836fbc6f9c.jpg

Here is the equation to be solved : The red equation belowi the analytical solution I want to get solution for. The data to be used: The following data is to be used: t=3000000 r=nr=nx=161 q=0.02 k=5e-13 mu=0.00035 c=1.5e-8 phi=0.25 rw=0.1 h=4.5 My code is below...

Hi, I am trying to incorporate the following equation into Matlab in the red: http://http://www.radikal.ru][PLAIN]http://s018.radikal.ru/i518/1305/16/1cc0d2a72d38.jpg The following data is to be used: t=3000000 nr=nx=161 q=0.02 k=5e-13 mu=0.00035 c=1.5e-8 phi=0.25 rw=0.1 h=4.5...

What do xint and yint stand for?

What do xint and yint stand for?

Hi, How can I set Matlab to display all the calculation results? I am solving the system of ODEs with large spatial variable and time step distribution. If I set total time to 100 with time step of 1 only the results starting from t=50 are displayed. How to fix it?:frown: Thanks.

Hey, guys How can the following equation be entered into matlab: http://i074.radikal.ru/1304/fe/a8b8e0fccbe5.png Thakns.

Guys, I need to solve by Matlab the following PDE: I am desperate about finding solution; I have tried many approaches, and the files attached on topic start is my last approach.

Ok. What kind of method can you suggest to deal with [∂p/∂x] 2 ? I am going to convert the above equation to ODE by method of lines in Matlab. I guess that non-linear terms require special approach.

Hey, mate You can download dss004 m file from the following link: https://www.physicsforums.com/showthread.php?p=4292439#post4292439. I couldn't upload the dss004 file, so decided to redirect you to my previous post where I have already atttached dss004.

hello, guys Below is the equation I am concerned with: Is the above equation non-linear because of (delta P/delta x)^2 term assuming other variables are constant and don't change with pressure , P?