At Pr > 1, conduction in an ordinary fluid flowing through a heated pipe is limited to the

Related MCQs

• At what value of Prandtl number, conduction is negligible in the turbulent core of a fluid flowing through a heated pipe?
• Heat transfer by conduction in the turbulent core of a fluid flowing through a heated pipe is negligible, if the value of Prandtl number is
• Conduction occurs in the buffer zone for a fluid flowing through a heated pipe, only when Prandtl number is
• The characteristic dimensionless groups for heat transfer to a fluid flowing through a pipe in laminar flow are
• If average heat transfer co-efficient is ha and the local coefficient at the end of the plate is hl then in case of heat transfer to a fluid flowing over a flat plate, heated over its entire length
• At what value of Prandtl number, the hydrodynamic and thermal boundary layers of a fluid flowing over a heated plate will be identical?
• In case the hydrodynamic and thermal boundary layers are identical for a fluid flowing over a heated plate
• A fluid is flowing inside the inner tube of a double pipe heat exchanger with diameter 'd'. For a fixed mass flow rate, the tube side heat transfer co-efficient for turbulent flow conditions is proportional to
• Heat transfer co-efficient (h) for a fluid flowing inside a clean pipe is given by h = 0.023 (K/D) (DVρ/µ) 0.8 (CP.µ/k) 0.4. This is valid for the value of NRe equal to
• A 10 cm dia steam pipe, carrying steam at 180°C, is covered with an insulation (conductivity = 0.6 W/m.°C). It losses heat to the surroundings at 30°C. Assume a heat transfer co-efficient of 0.8 W/m2 .°C for heat transfer from surface to the surroundings. Neglect wall resistance of the pipe and film resistance of steam. If the insulation thickness is 2 cms, the rate of heat loss from this insulated pipe will be