International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 12 Issue: 05 | May 2025
p-ISSN: 2395-0072
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The Study on the Change of the Thermal Conduct by the Animal Fur Form Sorts Jongchol Lee1, Gwangil Jong2, Yongbong Lee3 1 Dept. of Program Engineering, University of Science, D.P.R of Korea.
2 Professor, Doctor, Dept. of Biology Engineering, University of Science, D.P.R of Korea. 3 Dept. of Program Engineering, University of Science, D.P.R of Korea. ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract - An abstract summarizes, in one paragraph,
through the rod and that heat is released by convection into the surrounding medium.
from the upper research, the thermal interchange velocity in the animal, furs and in the bird, feathers showed with the cooling pin is marked as to the next formula, the thermal efficiency is
This phenomenon can be expressed by differential equations. It is assumed that the cooling fin is make a protruding appearance, the thermal conductivity is constant, the fluid temperature around the cooling fin is constant and the temperature varies only in the x-axis.
Q f f Q max f aAf (Tb T ) , marked as to the ratio of the feather, and the thermal interchange ( ) on the maximum thermal intercha
Qf
nge
Q max
Since the hair and fins in animals are usually thin, small and slender, the cooling fins we discuss are made thin, and we can assume a one-dimensional condition as follows. As to see the Fig 1, in the x-spot, the length of the fur is △x, the cut area of the fur is A0, the volume element that the length of the fur is p is 1-dimention condition. Then, in case the stable state, the correlation formula on the energy, equation can be written, as follow.
in case of the ideological,the thermal efficien-cy is
marked as to the ratio of the feather, and the fur, thermal interchange ( ) on the maximum thermal interchange
Qf
Q max
in case of the ideological.
Qf
Qf
1
Q max
aA f Qb
Key Words: the cooling pin, thermal interchange velocity, animal, bird
1. THE CHANGE ANALYSIS ON THE THERMAL CONDUCT BY THE ANIMAL EXTERNAL SURFACE FORM IN THE COLDEN PIN FORMS Generally, the cooling fin type is used to increase the heat exchange rate between the solid surface and the surrounding fluid. For example, animal feathers (including birds' wings and feathers) act as cooling wings, and the shape of scales in ectothermic animals, such as amphibians, reptiles, etc., that are in evolution, depends on the environment. Thus, it can be expected that the structure of the feathers (lion et al., etc.) and birds’ wings in the neck of reptiles evolved to play a role as cooling wings.
Fig -1: The thermal exchange in the cooling pin, form,
Q con : the heat-qualitative change in the convection,
Q td , x : the thermal conduct
Let this phenomenon is marked with the differential equation. Suppose there is any type of cooling vane, as shown in Fig. 1. Let us assume that heat is supplied at one end of the cooling fin and that this heat is heat transferred
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Q td,x Q td,x+x Q con
(1)
Q con a ( p x )(T T )
(2)
Here is
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