Sv. Ekkad et Jc. Han, HEAT-TRANSFER INSIDE AND DOWNSTREAM OF CAVITIES USING TRANSIENT LIQUID-CRYSTAL METHOD, Journal of thermophysics and heat transfer, 10(3), 1996, pp. 511-516
Local heat transfer coefficient distributions are investigated inside
and downstream of various cavities on a flat surface, The effect of ca
vity size, depth, and shape are studied using a transient liquid cryst
al image method. Liquid crystals are sprayed on the test surface and a
hot mainstream is imposed, suddenly causing a color change, The time
of color change is obtained using an image processing system. An incre
ase in cavity size for the same depth increases heat transfer coeffici
ents on the test surface, An increase in cavity depth increases downst
ream heat transfer coefficients. Five cavity shapes are studied to com
pare local heat transfer behavior for the effect of various shapes.