What is Biot No?
Biot No is a dimensionless No defined as Bi= hL/kb (No unit). h= convective heat transfer co efficient (unit isW/m2 K)
L= characteristic length (Volume of the body/ surface area of the body” unit is metre)
kb= thermal conductivity of the body(W/mK)
It is the ratio between conductive heat transfer within a body to that of convective heat transfer away from the body. If it is above one means convection is more and less than one means conduction is more.
Biot No is a dimensionless No defined as Bi= hL/kb (No unit). h= convective heat transfer co efficient (unit isW/m2 K)
L= characteristic length (Volume of the body/ surface area of the body” unit is metre)
kb= thermal conductivity of the body(W/mK)
It is the ratio between conductive heat transfer within a body to that of convective heat transfer away from the body. If it is above one means convection is more and less than one means conduction is more.
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