## THERMAL SCIENCE

International Scientific Journal

### NUMERICAL SOLUTION OF CONTAMINATED OIL ALONG A VERTICAL WAVY FRUSTUM OF A CONE

**ABSTRACT**

The effect of wavy surface on natural convection flow of two-phase dusty fluid over a vertical frustum of a cone is presented in this paper. The boundary-layer regime having the large value of Grashof number is considered and the wavy surface is assumed to have wavelength and amplitude of O(1). A sinusoidal surface is used as a particular example to elucidate the heat transfer mechanism near such surfaces. The transformed boundary-layer equations are solved numerically and detailed results for the skin friction and rate of heat transfer coefficients are presented for a selected parameters: wavy surface amplitude, half cone angle, mass concentration parameter, and dust parameter. Comprehensive flow formations of the contaminated oil having Prandtl number equal to 500.0, are given with the aim to predict the enhancement of heat transport across the heated wavy frustum of the cone.

**KEYWORDS**

PAPER SUBMITTED: 2016-04-25

PAPER REVISED: 2016-04-26

PAPER ACCEPTED: 2016-08-18

PUBLISHED ONLINE: 2016-10-01

**THERMAL SCIENCE** YEAR

**2018**, VOLUME

**22**, ISSUE

**6**, PAGES [2933 - 2942]

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