Continuing from the question above, its yield value is dynes/cm2. Shear rate (sec-1) Shearing stress (dynes/cm2) 10 6,200 40 8,500 100 10,200 200 11,200 300 12,200 400 13,200 500 14,200 600 15,200

Awall of 0.5m thickness is to be constructed from a material which has average thermal conductivity of 1.4 w/mk. the wall is to be insulated with a material having an average thermal conductivity of 0.35 w/mk so that heat loss per square meter shall not exceed 1450 w. assume inner wall surface temperature of 1200°c and outer surface temperature of the insulation to be 15°c. calculate the thickness of insulation required.