Mechanism to synthesize a ‘moving optical mark’ at solid-ambient interface for the estimation of thermal diffusivity of solid | Zendy

S. Balachandar | Zendy; N. C. Shivaprakash | Zendy; Lakshminarayana Rao | Zendy

Open Access

Mechanism to synthesize a ‘moving optical mark’ at solid-ambient interface for the estimation of thermal diffusivity of solid

Author(s) -

S. Balachandar,

N. C. Shivaprakash,

Lakshminarayana Rao

Publication year - 2016

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4941342

Subject(s) - thermal diffusivity , materials science , thermal , position (finance) , quartz , interface (matter) , phase (matter) , solid surface , mechanics , optics , thermodynamics , chemical physics , composite material , chemistry , physics , capillary action , organic chemistry , finance , capillary number , economics

A novel mechanism is proposed, involving a novel interaction between solid-sample supporting unsteady heat flow with its ambient-humidity; invokes phase transformation of water-vapour molecule and synthesize a ‘moving optical-mark’ at sample-ambient-interface. Under tailored condition, optical-mark exhibits a characteristic macro-scale translatory motion governed by thermal diffusivity of solid. For various step-temperature inputs via cooling, position-dependent velocities of moving optical-mark are measured at a fixed distance. A new approach is proposed. ‘Product of velocity of optical-mark and distance’ versus ‘non-dimensional velocity’ is plotted. The slope reveals thermal diffusivity of solid at ambient-temperature; preliminary results obtained for Quartz-glass is closely matching with literature

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