thermal conductivity

A plane, solid slab of thickness L, shown in the figure, has thermal conductivity k that varies with the spatial coordinate x as k = A + Bx, where A and B are positive constants (A...

Consider a slab of 20 mm thickness. There is a uniform heat generation of $\dot{q}$ = 100 MW/m$^3$ inside the slab. The left and right faces of the slab are maintained at 150 °C an...

Consider a laterally insulated rod of length L and constant thermal conductivity. Assuming one-dimensional heat conduction in the rod, which of the following steady-state temperatu...

An infinitely long pin fin, attached to an isothermal hot surface, transfers heat at a steady rate of Q₁ to the ambient air. If the thermal conductivity of the fin material is doub...

Ambient air flows over a heated slab having flat, top surface at y = 0. The local temperature (in Kelvin) profile within the thermal boundary layer is given by T(y) = 300 + 200 exp...

A slender rod of length L, diameter d (L>> d) and thermal conductivity k1 is joined with another rod of identical dimensions, but of thermal conductivity k2, to form a composite cy...

As the temperature increases, the thermal conductivity of a gas

In descending order of magnitude, the thermal conductivity of $$(a)$$ Pure iron, $$(b)$$ liquid water, $$(c)$$ saturated water vapour, and $$(d)$$ aluminum can be arranged as

A gas filled tube has $$2$$ $$mm$$ inside diameter and $$25$$ $$cm$$ length. The gas is heated by an electrical wire of diameter $$50$$ microns ($$0.05$$ $$mm$$) located along the...

For a given heat flow and for the same thickness, the temp drop across the material will be maximum for

Match the property with their units Property $$A.$$ Bulk modulus $$B.$$ Thermal conductivity $$C.$$ Heat transfer coefficient $$D.$$ Heart flow rate Units $$1.$$ $$W/s$$ $$2.$$ $$N...

Thermal conductivity is lower for