add uuid to frontmatter

computery_stuff/bash.md

@@ -2,7 +2,11 @@
 author: Alvie Rahman
 date: \today
 title: Bash
-tags: [ linux, shell, programming ]
+tags:
+- linux
+- shell
+- programming
+uuid: a436d67a-1f07-45fb-9241-5dbaa69b4667
 ---
 
 # `set` builtin[^gnuset]

computery_stuff/docker_nginx_lets_encrypt.md

@@ -2,7 +2,11 @@
 author: Alvie Rahman
 date: \today
 title: Setting Up Nginx and Let's Encrypt in Docker
-tags: [ linux, docker, programming ]
+tags:
+- linux
+- docker
+- programming
+uuid: 2abad576-9921-463b-928d-2381f91488e0
 ---
 
 # Setting Up Nginx and Let's Encrypt in Docker

computery_stuff/git.md

@@ -2,7 +2,11 @@
 author: Alvie Rahman
 date: \today
 title: Git
-tags: [ linux, programming, git ]
+tags:
+- linux
+- programming
+- git
+uuid: 8eb93ba5-72e8-4c25-b1f5-02e25408a14d
 ---
 
 

computery_stuff/gnome.md

@@ -2,7 +2,11 @@
 author: Alvie Rahman
 date: \today
 title: GNOME is a Whole Mess
-tags: [ gnome, linux, troubleshooting ]
+tags:
+- gnome
+- linux
+- troubleshooting
+uuid: 635199f2-f2c6-4f94-840f-8f729bde0c13
 ---
 
 Gnome is, like, a whole mess. These are the weird issues I had to solve.

computery_stuff/go.md

@@ -2,7 +2,10 @@
 author: Alvie Rahman
 date: \today
 title: Go (golang)
-tags: [ golang, programming ]
+tags:
+- golang
+- programming
+uuid: 70d24c2e-25f6-4a46-9756-659d13b5149f
 ---
 
 # Getting Up to Speed With Go

computery_stuff/libvirt.md

@@ -2,7 +2,10 @@
 author: Alvie Rahman
 date: \today
 title: libvirt
-tags: [ linux, virtualisation ]
+tags:
+- linux
+- virtualisation
+uuid: 62c2f458-f701-4075-8e12-d9b9a59efd1f
 ---
 
 # issues

computery_stuff/linux.md

@@ -2,7 +2,9 @@
 author: Alvie Rahman
 date: \today
 title: Linux
-tags: [ linux ]
+tags:
+- linux
+uuid: 8ef11516-4afd-4f80-abb8-bdce045e8b65
 ---
 
 # user stuff

computery_stuff/postgres.md

@@ -2,7 +2,9 @@
 author: Alvie Rahman
 date: \today
 title: Postgres
-tags: [ programming ]
+tags:
+- programming
+uuid: 7e44b054-4b6e-4f8c-b9af-9d4c4bf77878
 ---
 
 \tableofcontents

computery_stuff/pulseaudio.md

@@ -2,7 +2,14 @@
 author: Alvie Rahman
 date: \today
 title: Pulseaudio
-tags: [ pulseaudio, linux, audio, mixing, microphone, sink ]
+tags:
+- pulseaudio
+- linux
+- audio
+- mixing
+- microphone
+- sink
+uuid: 4e251354-9afb-49fd-abd9-fedc9b280a25
 ---
 
 # Collect and Mix Sound Input From Different Sources {#paMixer}

computery_stuff/python.md

@@ -2,7 +2,12 @@
 author: Alvie Rahman
 date: \today
 title: Python
-tags: [ docker, python, programming, io ]
+tags:
+- docker
+- python
+- programming
+- io
+uuid: cd5c50f9-66f4-4a3b-b89a-04a20ecd642b
 ---
 
 # Issues

computery_stuff/xps_15_9570.md

@@ -2,7 +2,13 @@
 author: Alvie Rahman
 date: \today
 title: Dell XPS 15 (9570)
-tags: [ dell, xps, xps_15, windows, drivers ]
+tags:
+- dell
+- xps
+- xps_15
+- windows
+- drivers
+uuid: 489c3145-b3b8-43e0-b51c-c788977e2907
 ---
 
 # Installing Windows: A media driver your computer needs is missing.

uni/mmme/1026_maths_for_engineering/calculus.md

@@ -2,7 +2,15 @@
 author: Alvie Rahman
 date: \today
 title: MMME1026 // Calculus
-tags: [ uni, nottingham, mechanical, engineering, mmme1026, maths, calculus ]
+tags:
+- uni
+- nottingham
+- mechanical
+- engineering
+- mmme1026
+- maths
+- calculus
+uuid: 126b21f8-e188-48f6-9151-5407f2b2b644
 ---
 
 # Calculus of One Variable Functions

uni/mmme/1026_maths_for_engineering/complex_numbers.md

@@ -2,7 +2,15 @@
 author: Alvie Rahman
 date: \today
 title: MMME1026 // Complex Numbers
-tags: [ uni, nottingham, mechanical, engineering, mmme1026, maths, complex_numbers ]
+tags:
+- uni
+- nottingham
+- mechanical
+- engineering
+- mmme1026
+- maths
+- complex_numbers
+uuid: b9be8780-1ab7-402f-9c67-8cc74a74f7a9
 ---
 
 # Complex Numbers

uni/mmme/1026_maths_for_engineering/systems_and_matrices.md

@@ -2,7 +2,16 @@
 author: Alvie Rahman
 date: \today
 title: MMME1026 // Systems of Equations and Matrices
-tags: [ uni, nottingham, mechanical, engineering, mmme1026, maths, systems_of_equations, matrices ]
+tags:
+- uni
+- nottingham
+- mechanical
+- engineering
+- mmme1026
+- maths
+- systems_of_equations
+- matrices
+uuid: 16edb140-9946-4759-93df-50cad510fe31
 ---
 # Systems of Equations (Simultaneous Equations)
 

uni/mmme/1026_maths_for_engineering/vectors.md

@@ -2,7 +2,15 @@
 author: Akbar Rahman
 date: \today
 title: MMME1026 // Vectors
-tags: [ uni, nottingham, mechanical, engineering, mmme1026, maths, vectors ]
+tags:
+- uni
+- nottingham
+- mechanical
+- engineering
+- mmme1026
+- maths
+- vectors
+uuid: ef1669d9-b8c3-4813-8b33-5764a2f57a55
 ---
 
 Vectors have a *magnitude* (size) and *direction*.
@@ -248,7 +256,7 @@ $$\frac{x-x_0}{d_1} = \frac{y-y_0}{d_2} = \frac{z-z_0}{d_3}$$
 A *plane* can be defined by specifying either:
 
 - three points (as long as they're not in a straight line)
-- a point on the plne and two directions (useful for a parametric form)
+- a point on the plane and two directions (useful for a parametric form)
 - specifying a point on the plane and the normal vector to the plane
 
 #### Specifying a Point and a Normal Vector
@@ -263,7 +271,7 @@ $$(\pmb r - \pmb a) \cdot \pmb n = 0$$
 
 So the *vector equation* of the plane is
 
-$$\pmb r \cdot \pmb n = \pmb a \cdot n = d$$
+$$\pmb r \cdot \pmb n = \pmb a \cdot \pmb n = \pmb d$$
 
 where $\pmb r = (x, y, z)$ and the vectors $\pmb a$ and $\pmb n$ are known.
 
@@ -291,6 +299,7 @@ and so the equation of the plane is
 
 $$(\pmb r - \pmb a)\cdot((\pmb c - \pmb a)\times(\pmb c - \pmb b)) = 0$$
 
+
 #### The Angle Between Two Planes
 
 ... is the same as the angle between their normal vectors

uni/mmme/1028_statics_and_dynamics/statics.md

@@ -11,6 +11,7 @@ tags:
 - statics
 - dynamics
 title: MMME1028 // Statics
+uuid: 2ddad9d0-b085-4602-aca9-c573351558ba
 ---
 
 # Lecture L1.1, L1.2

uni/mmme/1029_materials_and_manufacturing/manufacturing.md

@@ -2,7 +2,14 @@
 author: Alvie Rahman
 date: \today
 title: MMME1029 // Manufacturing
-tags: [ uni, nottingham, mechanical, engineering, mmme1029, manufacturing ]
+tags:
+- uni
+- nottingham
+- mechanical
+- engineering
+- mmme1029
+- manufacturing
+uuid: b5fae4fd-32c3-4fd8-a05a-7440d6c44f9c
 ---
 
 # Cost Modelling

uni/mmme/1029_materials_and_manufacturing/materials.md

@@ -2,7 +2,14 @@
 author: Alvie Rahman
 date: \today
 title: MMME1029 // Materials
-tags: [ uni, nottingham, mechanical, engineering, mmme1029, materials ]
+tags:
+- uni
+- nottingham
+- mechanical
+- engineering
+- mmme1029
+- materials
+uuid: 755626f6-53ae-473a-8ff8-185ca9427bfd
 ---
 
 \tableofcontents

uni/mmme/1048_thermodynamics_and_fluid_mechanics/fluid_dynamics.md

@@ -2,7 +2,15 @@
 author: Alvie Rahman
 date: \today
 title: MMME1048 // Fluid Dynamics
-tags: [ uni, nottingham, mechanical, engineering, fluid_mechanics, mmme1048, fluid_dynamics ]
+tags:
+- uni
+- nottingham
+- mechanical
+- engineering
+- fluid_mechanics
+- mmme1048
+- fluid_dynamics
+uuid: b88f78f8-a358-460b-9dbb-812e7b1ace92
 ---
 
 \newcommand\Rey{\mbox{\textit{Re}}}
@@ -384,3 +392,157 @@ Head form:
 \frac{p_s}{\rho g} + z + \frac{v^2}{2g} &= \text{total head} \\
 \frac{p_s}{\rho g} + z &= \text{piezometric head}
 \end{align*}
+
+# Steady Flow Energy Equation (SFEE)
+
+SFEE is a more general equation that can be applied to **any fluid** and also is also takes
+**heat energy** into account.
+This is useful in applications such as a fan heater, jet engines, ICEs, and steam turbines.
+
+The equation deals with 3 types of energy tranfer:
+
+1. Thermal energy transfer (e.g. heat tranfer from central heating to a room)
+2. Work energy transfer (e.g. shaft from car engine that turns wheels)
+3. Energy transfer in fluid flows (e.g. heat energy in a flow, potential energy in a flow, kinetic
+   energy in a flow)
+
+## Derivation of Steady Flow Energy Equation
+
+#### Consider a control volume with steady flows in and out and steady transfers of work and heat.
+
+The properties don't change with time at any any location and are considered uniform over inlet and
+outlet areas $A_1$ and $A_2$.
+
+For steady flow, the mass, $m$, of the fluid **within the control volume** and the total energy, $E$,
+must be constant.
+
+$E$ includes **all forms for energy** but we only consider internal, kinetic, and potential energy.
+
+#### Consider a small time interval $\delta t$.
+
+During $\delta t$, mass $\delta m_1$ enters the control volume and $\delta m_2$ leaves:
+
+![](./images/vimscrot-2022-03-01T22:47:31,932087932+00:00.png)
+
+The specific energy $e_1$ of fluid $\delta m_1$ is the sum of the specific internal energy, specific
+kinetic energy, and specific potential energy:
+
+$$e_1 = u_1 + \frac{v_1^2}{2} gz_1$$
+$$e_2 = u_2 + \frac{v_2^2}{2} gz_2$$
+
+Since the mass is constant in the control volume, $\delta m_1 = \delta m_2$.
+
+#### Applying the First Law of Thermodynamics
+
+The control volume is a system for which $\delta E_1$ is added and $\delta E_2$ is removed::
+
+$$\delta E = \delta E_2 - \delta E_1$$
+
+$E$ is constant so applying the
+[first law of thermodynamics](thermodynamics.html#st-law-of-thermodynamics)
+we know that:
+
+$$\delta Q + \delta W = \delta E$$
+
+We can also say that:
+
+$$\delta E = \delta E_2 - \delta E_1 = \delta m(e_2 - e_1)$$
+
+#### The Work Term
+
+The work term, $\delta W$, is mae up of shaft work **and the work necessary to deform the system**
+(by adding $\delta m_1$ at the inlet and removing $\delta m_2$ at the outlet):
+
+$$\delta W = \delta W_s + \text{net flow work}$$
+
+Work is done **on** the system by the mass entering and **by** the system on the mass leaving.
+
+For example, at the inlet:
+
+![](./images/vimscrot-2022-03-01T22:59:14,129582752+00:00.png)
+
+$$\text{work done on system} = \text{force} \times \text{distance} = p_1A_1\delta x = p_1\delta V_1$$
+
+Knowing this, we can write:
+
+$$\delta W = \delta W_s + (p_1\delta V_1 - p_2\delta V_2)$$
+
+#### Back to the First Law
+
+Substituting these equations:
+
+$$\delta E = \delta E_2 - \delta E_1 = \delta m(e_2 - e_1)$$
+$$\delta W = \delta W_s + (p_1\delta V_1 - p_2\delta V_2)$$
+
+into:
+
+$$\delta Q + \delta W = \delta E$$
+
+gives us:
+
+$$\delta Q + \left[ \delta W_s + (p_1\delta V_1 - p_2\delta V_2)\right] = \delta m (e_2-e_1)$$
+
+Dividing everything by $\delta m$ and with a bit of rearranging we get:
+
+$$q + w_s = e_2-e_1 + \frac{p_2}{\rho_2} - \frac{p_1}{\rho_1}$$
+
+#### Substiute Back for $e$
+
+$$e = u + \frac{v^2}{2} + gz$$
+
+This gives us:
+
+$$q + w_s + \left[ u_2 + \frac{p_2}{\rho_2} + gz_2 + \frac{v_2^2}{2} \right] - \left[ u_1 + \frac{p_1}{\rho_1} + gz_1 + \frac{v_1^2}{2} \right]$$
+
+#### Rearrange and Substitute for Enthalpy
+
+By definition, enthalpy $h = u + pv = u + \frac p \rho$.
+This gives us the equation:
+
+$$q + w_s = (h_2 - h_1) + g(z_2-z_1) + \frac{v_2^2-v_1^2}{2}$$
+
+This equation is in specific energy form.
+
+Multiplying by mass flow rate will give you the power form.
+
+## Application of the Steady Flow Energy Equation
+
+#### Heat Transfer Devices
+
+Like heat exchangers, boilers, condensers, and furnaces.
+
+In this case, $\dot W = 0$, $\delta z ~ 0$, and $\delta v^2 ~ 0$ so the equation can be simplified
+to just
+
+$$\dot Q = \dot m(h_2-h_1) = \dot m c_p(T_2-T_1)$$
+
+#### Throttle Valve
+
+No heat and work transfer.
+Often you can neglect potential and kinetic energy terms, giving you:
+
+$$0 = h_2-h_1)$$
+
+#### Work Transfer Devices
+
+e.g. Turbines, Pumps, Fans, and Compressors
+
+For these there is often no heat transfer ($\dot Q = 0$) and we can neglect potential
+($\delta z ~ 0$) and kinetic ($\delta v^2 ~ 0$) energy terms, giving us the equation
+
+$$\dot W = \dot m (h_2-h_1) = \dot m c_p(T_2-T_1)$$
+
+#### Mixing Devices
+
+e.g. hot and cold water in a shower
+
+In these processes, work and heat transfers are not important and you can often
+neglect potential and kinetic energy terms, giving us the same equation as for the throttle valve
+earlier:
+
+$$0 = h_2-h_1$$
+
+which you may want to write more usefully as:
+
+$$\sum \dot m h_{out} = \sum \dot m h_{in}$$
+

uni/mmme/1048_thermodynamics_and_fluid_mechanics/fluid_mechanics.md

@@ -2,7 +2,15 @@
 author: Alvie Rahman
 date: \today
 title: MMME1048 // Fluid Mechanics Intro and Statics
-tags: [ uni, nottingham, mechanical, engineering, fluid_mechanics, mmme1048, fluid_statics ]
+tags:
+- uni
+- nottingham
+- mechanical
+- engineering
+- fluid_mechanics
+- mmme1048
+- fluid_statics
+uuid: 43e8eefa-567f-438b-b93d-63ae08e61d8f
 ---
 
 # Properties of Fluids

uni/mmme/1048_thermodynamics_and_fluid_mechanics/thermodynamics.md

@@ -2,7 +2,14 @@
 author: Alvie Rahman
 date: \today
 title: MMME1048 // Thermodynamics
-tags: [ uni, nottingham, mechanical, engineering, mmme1048, thermodynamics ]
+tags:
+- uni
+- nottingham
+- mechanical
+- engineering
+- mmme1048
+- thermodynamics
+uuid: db8abbd9-1ef4-4a0d-a6a8-54882f142643
 ---
 
 # What is Thermodynamics?

uni/us/applied_technology.md

@@ -2,7 +2,11 @@
 author: Alvie Rahman
 date: \today
 title: Applied Technology
-tags: [ uni, university_of_sussex, applied_technology ]
+tags:
+- uni
+- university_of_sussex
+- applied_technology
+uuid: 0ec5e507-b024-4594-800a-131cbbe83619
 ---
 
 <details>