conduction

  1. mscfd

    Heat conduction problem

    Here is the question: Consider a pool reactor (Fig. 2-33) whose core is constructed from a number of vertical fuel plates of thickness 2L. Initially the system has the uniform temperature T; then assume that the constant nuclear internal energy u"' is uniformly generated in these plates. The...
  2. S

    Transienent conduction in a cylinder

    Hi guys, I have a MatLab assignment that seems to be more complicated then i first thought. I'm supposed to write a numerical scheme solving transient heat conduction in a cylinder (T=T(r,z,t)). The B.C's are constant heat flux at r=a (Neuman) and constant temperature at the base of the...
  3. W

    Which transfers more heat as a whole in the universe?

    Which transfers more heat as a whole in the universe? Conduction vs radiation The most obvious guess is radiation due to stars. Conduction seems to be considered negligible in stars but I've only read that in the context of energy transport to the surface and not necessarily just back and...
  4. R

    Conduction or convection

    Hi, I am working in the design of a packaging for a pressure-temperature sensor, the idea is put the sensot in a silicone oil chamber (diameter 18 mm, heigth 3-8 mm), and over the chamber a steel diaphragm (30 um thickness) receiving the pressure and the temperature. As the silicon oil is...
  5. R

    heat conduction coefficient in tungsten

    Hello! I am supposed to explain the behaviour of the thermal conductivity of tungsten. I have plotted the relation http://img340.imageshack.us/img340/9776/heatcond.jpg is also experimental data Temp[0 10 50 100 300 500 1000 2000 3400] and thermal conductivity coefficient 0 97,1 4,28 2,08 1,74...
  6. I

    Physics Conduction Problem

    aluminum pot contains .015 kg of water at 100 C, and boils for 4 mins. the bottom of the pot is 3.1 * 10^-3 m thick and has a surface area of .015 m2. a stainless steel plate has been placed between the pot and heating element, it is 1.4* 10^-3 thick, and the area matches that of the pot...
  7. N

    Time to Equlibrium - Conduction

    I'm trying to build a simple model to determine the temperature of a solution in a refrigerator assuming that the temperature in the refrigerator is constant. I'm also assuming that the solution in the fridge is the same temperature as it's vessel and that the vessel is solid and made only of...
  8. B

    how to find the conduction in the question

    hey guys im having a bit of trouble on this question that ive started. the question is summarised as a 600kg mass with density same as water has a core temp of 47 degrees and surface temp of 20 degress. the air temp is 4 degress and a breeze blows causing convective cooling with a heat...
  9. T

    thermal conduction 2

    A closed reactangular polystyrene box has the internal dimensions of 20 cm x 40 cm x 60 cm . THe thickness of the box is 2.0 cm and the whole space in the box is filled with ice at 0 degree celcius . If the room temperature is 25 degree celcius , estimate the time taken , in hours , for all the...
  10. T

    thermal conduction

    Thermal conductivity varies along an insulated metal rod with high temperature difference between its free ends that are maintained at temperature theta 1and theta 2 where theta 2>theta 1 . Discuss qualitatively , whether the temperature at the midpoint of the rod is more than or less than...