Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning - Discussion
Discussion Forum : Heat Transfer, Refrigeration and Air Conditioning - Section 1 (Q.No. 30)
30.
The highest thermal diffusivity is of
Discussion:
11 comments Page 1 of 2.
Govind agrawal said:
1 decade ago
For iron:
Thermal difference = k/(den*heat cap) = 46.33/(.26*.12) = 1484.93.
For lead:
Thermal diff = k/(den*heat cap) = 20.39/(.41*.032) = 1554.12.
HENCE LEAD is correct answer.
Thermal difference = k/(den*heat cap) = 46.33/(.26*.12) = 1484.93.
For lead:
Thermal diff = k/(den*heat cap) = 20.39/(.41*.032) = 1554.12.
HENCE LEAD is correct answer.
(1)
Jagan said:
1 decade ago
Option is iron because k value is high out of given options.
Thermal diffusivity = k/heat capacity.
Thermal diffusivity = k/heat capacity.
Goutham said:
1 decade ago
What is the k value of lead?
Badri said:
1 decade ago
That is not the K value, it is Thermal Diffusivity 'ALPHA' value for lead is 23.46*10^-6.
Vivek said:
1 decade ago
Thermal diff = thermal conductivity/density * heat capacity at constant pressure.
But what is the value of k for iron and lead.
But what is the value of k for iron and lead.
Kannan p said:
1 decade ago
Iron K = 80w/mk.
Lead K = 35w/mk.
Iron is correct answer.
Lead K = 35w/mk.
Iron is correct answer.
Rishabh said:
9 years ago
Yes, lead is correct answer.
I agree with you @Govind Agrawal.
I agree with you @Govind Agrawal.
Prasantabal said:
6 years ago
You are Absolutely right, thanks @Govind.
Sajid mohammed said:
6 years ago
Wood is correct.
KBGAJJAR said:
1 year ago
I think the highest thermal diffusivity is typically found in materials with high thermal conductivity and low heat capacity.
Among the given options, iron tends to have the highest thermal diffusivity.
Among the given options, iron tends to have the highest thermal diffusivity.
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