4.- Una losa gruesa de acero ( = 7800 kg/m3 , c = 480 J/kg*
4.- Una losa gruesa de acero ( = 7800 kg/m3 , c = 480 J/kg*K, k =… 4.- Una losa gruesa de acero (? = 7800 kg/m3 , c = 480 J/kg*K, k = 50 W/m*K) está inicialmente a 300 °C y se enfría mediante chorros de agua incidiendo en una de sus superficies. La temperatura del agua es de 25 °C, y los chorros son extremadamente grandes, que mantienen aproximadamente el coeficiente de convección uniforme en la superficie. Suponga que la superficie se mantiene a la temperatura del agua durante todo el enfriamiento, ¿Cuánto tiempo tomará para que la temperatura alcance 50 °C a una distancia de 35 mm de la superficie?. Engineering & Technology Mechanical Engineering ENGINEERIN MEEN420
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