Effect of size on heat processing meat. an autoclave held at 121.1°c is being used to process sausage meat 101.6 mm in diameter and 0.61 m long which is originally at 21.1°c. after 2 h the temperature at the center is 98.9°c. if the diameter is increased to 139.7 mm, how long will it take for the center to reach 98.9°c? the heat-transfer coefficient to the surface is h = 1100 w/m^2 * k, which is very large, so the surface resistance can be considered negligible. (show this.) neglect the heat transfer from the ends of the cylinder. the thermal conductivity k = 0.485 w/m * k.