## THERMAL SCIENCE

International Scientific Journal

### A FRACTIONAL MODEL FOR HEAT TRANSFER IN MONGOLIAN YURT

**ABSTRACT**

A yurt is a portable tent-like dwelling structure favored by Mongolian nomads for more than three millennia and it can be favorably used even at a harsh environment as low as -50 degrees. The paper concludes that the multi-layer structure of the felt cover is the key for weatherproofing. A fractional differential model with He's fractional derivative is established to find an optimal thickness of the fractal hierarchy of the felt cover. A better understanding of the yurt mechanism could help the further design of yurt-like space suits and other protective clothing for extreme cold region.

**KEYWORDS**

PAPER SUBMITTED: 2015-01-10

PAPER REVISED: 2016-05-05

PAPER ACCEPTED: 2016-07-12

PUBLISHED ONLINE: 2017-09-09

**THERMAL SCIENCE** YEAR

**2017**, VOLUME

**21**, ISSUE

**Issue 4**, PAGES [1861 - 1866]

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