A thin coating is placed onto a wooden surface to waterproof it. In order to apply...

 

Transcribed Image Text:

A thin coating is placed onto a wooden surface to waterproof it. In order to apply the coating, which is 2mm thick, it is put on at an initial uniform temperature of T; = 200°C. The coating has a thermal conductivity of k = 0.2 and has a thermal diffusivity of a = 1.50 · 10−7m². W mk' - min S W m² K order for it to move onto the next phase of the curing process, it must reach a surface temperature of 50°C. It is cooled by air flow with a convection coefficient of h = 210- bulk fluid temperature of Too = 20°C. In order to get a rough idea of how long this takes, you can make the simplifying assumption that no heat flows to the wooden surface. How long will it take for the surface to reach 50°C?. b. Using Matlab, plot the temperature as a function of time from Fo> 0.2 until the time found in part (a). and a A thin coating is placed onto a wooden surface to waterproof it. In order to apply the coating, which is 2mm thick, it is put on at an initial uniform temperature of T; = 200°C. The coating has a thermal conductivity of k = 0.2 and has a thermal diffusivity of a = 1.50 · 10−7m². W mk' - min S W m² K order for it to move onto the next phase of the curing process, it must reach a surface temperature of 50°C. It is cooled by air flow with a convection coefficient of h = 210- bulk fluid temperature of Too = 20°C. In order to get a rough idea of how long this takes, you can make the simplifying assumption that no heat flows to the wooden surface. How long will it take for the surface to reach 50°C?. b. Using Matlab, plot the temperature as a function of time from Fo> 0.2 until the time found in part (a). and a

Answer rating: 100% (QA)

To determine the time it takes for the surface of the coating to reach 50C we can use the equation f... View the full answer