lecture notes, slides on gas mixtures and combustion, heat transfer

uni/mmme/2047_thermodynamics_and_fluid_dynamics/heat_transfer.md

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+---
+author: Akbar Rahman
+date: \today
+title: MMME2047 // Heat Transfer
+tags: [ heat_transfer ]
+uuid: d3ba66c2-e486-464a-a4df-f23f2155ee6d
+lecture_slides: [ ./lecture_slides/6ConvHeatTransfer-without-written-comments.pptx ]
+lecture_notes: [ ./lecture_notes/ConvectHeatTrans2022-2023.pdf ]
+exercise_sheets: [ ./exercise_sheets/ExamplesConvectionHeatTransfer.pdf ]
+---
+
+# 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 ($I = \frac{\Deta V}{\sum R_\text{electrical}}$).