## THERMAL SCIENCE

International Scientific Journal

### HEAT DIFFUSION IN FRACTAL GEOMETRY COOLING SURFACE

**ABSTRACT**

In the paper the numerical simulation of heat diffusion in the fractal geometry of Koch snowflake is presented using multidomain mixed Boundary Element Method. The idea and motivation of work is to improve the cooling of small electronic devices using fractal geometry of surface similar to cooling ribs. The heat diffusion is assumed as the only principle of heat transfer. The results are compared to the heat flux of a flat surface. The limiting case of infinite small fractal element is computed using Richardson extrapolation.

**KEYWORDS**

PAPER SUBMITTED: 2012-04-04

PAPER REVISED: 2012-06-26

PAPER ACCEPTED: 2012-06-27

**THERMAL SCIENCE** YEAR

**2012**, VOLUME

**16**, ISSUE

**4**, PAGES [955 - 968]

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