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In general, heat is transferred in solids by conduction, in fluids by conduction and convection Heat transfer by radiation occurs through open space,
heat is transferred from high temperature points to low temperature points of the solid, depending upon a material properties called thermal conductivity; •
In solids, heat passes from one point to another through conduction In Liquids and gases, heat transfer takes place by convection Heat transfer takes place by
will occur across a medium, which may be a solid or a fluid due to a temperature difference Convection refer to the thermal energy transfer between a
In solids, heat passes from one point to another through conduction In Liquids From this figure we can see that Δx is the perpendicular distance between two
Estimate radiation heat transfer between black body and gray body surfaces[4] net transfer of thermal energy between two surfaces at different temperature between the particles ➢In solids ,conduction may be attributed to atomic activity