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Transient-(Unsteady-State-Heat-Conduction)

A person is found dead at 5 pm in a room whose temperature is 20 degree Celsius. The temperature of body is measured to be 25 degree Celsius, when found and heat transfer coefficient is estimated to be 8 W/m2 K. Modeling body as a 30 cm diameter, 1.7 cm long cylinder. Estimate time of death of person.


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This Chapter Transient-(Unsteady-State-Heat-Conduction) consists of the following topics

A thermocouple junction of spherical form is to be used to measure the temperature of the gas stream. The junction is at 20 degree Celsius and is placed in a gas stream which is at 200 degree Celsius. Make calculations for time required by the thermocouple to reach 197 degree Celsius temperature. Assume the thermos-physical properties as given below
k = 20 W/ m K
h = 350 W/m2 K
c = 0.4 k J/kg K
p = 8000 kg/m3

A person is found dead at 5 pm in a room whose temperature is 20 degree Celsius. The temperature of body is measured to be 25 degree Celsius, when found and heat transfer coefficient is estimated to be 8 W/m2 K. Modeling body as a 30 cm diameter, 1.7 cm long cylinder. Estimate time of death of person.

What percentage of water an average human body can have?

A person is found dead at 5 pm in a room whose temperature is 20 degree Celsius. The temperature of body is measured to be 25 degree Celsius

when found and heat transfer coefficient is estimated to be 8 W/m2 K. Modeling the body as a 30 cm diameter

1.7 cm long cylinder. Estimate the time of death of person.

Transient (Unsteady State Heat Conduction)

Heat-Transfer