then it will also depend on x so it will not be valid.... it becomes too complex, and for this, we can use Heisler charts. Reply after 7 months....none of any use 😅😂😂
Air convection coefficient depends on film temperature, therefore h values can be different at both sides. We must check Biot number for both halves of the flat plate to be able to assume that it's a lumped capacitance.
What if a solid suddenly into contact with another solid in a different temperature and we want to use the lumped capacitance method? How do we write the energy balance?
hello, can I get access to the textbook that you are extracting these courses from please?
is lumped capacitance approximation is valid if we don't ignore the radiation term ?
then it will also depend on x so it will not be valid.... it becomes too complex, and for this, we can use Heisler charts.
Reply after 7 months....none of any use 😅😂😂
we can check validation by using the Biot number which should be < 0.1
@@indianmanhere no worry
@@sainagupta6475 Tomorrow is my midsem exam of this subject 🤕
In radiation it's get too complicated🥲
What if we don't neglect radiation in the first case, meaning convection + radiation? do we still use this method?
Air convection coefficient depends on film temperature, therefore h values can be different at both sides. We must check Biot number for both halves of the flat plate to be able to assume that it's a lumped capacitance.
What if a solid suddenly into contact with another solid in a different temperature and we want to use the lumped capacitance method? How do we write the energy balance?