1.2 KiB
Executable File
1.2 KiB
Executable File
| author | date | title | tags | uuid | lecture_slides | lecture_notes | exercise_sheets | ||||
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| Akbar Rahman | \today | MMME2047 // Heat Transfer |
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d3ba66c2-e486-464a-a4df-f23f2155ee6d |
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Convection
- conduction and radiation heat transfer can be estimated by calculations and properties
- convection is dependent on fluid properties, flow type, and flow characteristics
The rate of convective heat transfer, \dot Q, is given by
\begin{equation} \dot Q = hA(T_f-T_w) \label{eqn:convectionheattransfer} \end{equation}
where T_w is the wall temperature, T_f is the fluid temperature, A is the area of heat flow,
and h is the heat transfer coefficient.
Thermal Resistance
Equation \ref{eqn:convectionheattransfer} can also be expressed in terms of thermal resistance, R_\text{thermal}:
\dot Q = \frac{T_f-T_w}{\sum R_\text{thermal}}where R_\text{thermal} = \frac{1}{hA}.
In a way this analogous to Ohm's law, specifically with resistors in series (I = \frac{\Delta V}{\sum R_\text{electrical}}).