# Recent content by grufff

1. ### MATLAB: Iterative solution using central divided difference method (8x8 Matrices)

Sorry to reply to my own post, but I'm okay with this now. The script was really quite straightforward to write. The syntax B(2,2) = (A(1,2)+A(3,2)+A(2,1)+A(2,3))/4 B(2,3) = (A(1,3)+A(3,3)+A(2,2)+A(2,4))/4 does work fine. It's simple to modify the matrix in this way, and then loop it for...
2. ### MATLAB: Iterative solution using central divided difference method (8x8 Matrices)

1. The problem statement I'd like to use Matlab to help me model and solve a simple 2D steady state heat conduction problem: A square section duct is buried in the earth some distance below the surface. This duct is at a steady temperature of 60 degrees C. I need to use the central divided...
3. ### Simple Heat Exchanger Problem (parallel and counterflow)

Homework Statement Exhaust gasses flowing through a tubular heat exchanger at a rate of 0.3kg/s are cooled from 400C to 120C by water initially at 10C. Specific heat capacities of the exhaust gasses and water may be taken as 1.13 and 4.19 kJ/kg K respectively, and overall heat transfer...
4. ### Simple Heat Transfer (convection and radiation, cylinder/pipe)

Homework Statement Reasonably simple (I hope!) heat transfer problem: Smooth cylinder of diameter (D) 0.8m and length (L) 1.2m has a surface temperature (Tsurf) of 240C (513K). Ambient air temp (Tamb) is 30C (303K). Emissivity of cylinder (E) is 0.85. Heat transfer coefficient of convection...