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All tagged heat transfer
Second Law of Thermodynamics: Heat naturally flows from high temperature to low temperature but not the other way around; Disorder, or entropy, generation is always positive in a closed system undergoing an irreversible process.
First Law of Thermodynamics: The conservation of energy - energy into a closed system must equal energy out of a closed system. Energy cannot be created or destroyed, but can be changed and transferred.
Zeroth Law of Thermodynamics: If object A is in thermal equilibrium with object B, and object B is in thermal equilibrium with object C, then object C is in thermal equilibrium with object A.
Metal foam is a porous material consisting of open-cell, closed-cell, or composite cavities. Open-cell metal foam has an interconnected network of pores. Closed-cell metal foam is similar to open-cell, but is sealed and may not have interconnectivity of internal pores. Composite metal foam combines a matrix of hollow metal beads of one material, such as steel or nickel, within another material, such as aluminum.
