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Postcard Professor
United States
Registrace 3. 11. 2011
Postcard Professor aims to take complex ideas and boil them down to the size of a postcard. Typically, this means a video clip with about 10-12 minutes of explanation and writing. The end product can be used as a reference sheet for homework problems.
I'm a professor at Abilene Christian University, and a strong believer that examples and lectures are more useful in video format, so that students can pause, think, rewind, and watch again. I'm making these for the classes I'm teaching, but I hope that they'll be useful to engineers around the world.
I'm a professor at Abilene Christian University, and a strong believer that examples and lectures are more useful in video format, so that students can pause, think, rewind, and watch again. I'm making these for the classes I'm teaching, but I hope that they'll be useful to engineers around the world.
Otto Cycle Analysis (constant specific heats)
Analyze the Otto cycle, which is common in internal combustion engines. After simplification of the ICE cycle to four processes, the processes are analyzed using constant specific heats, which means that gamma is constant throughout the use of the adiabatic/isentropic relations.
zhlédnutí: 1 461
Video
Ideal Gas Adiabatic/Isentropic Relations
zhlédnutí 6KPřed rokem
Calculate the properties of a gas undergoing an adiabatic process.
Basic CoolProp Tutorial (Python Thermodynamics)
zhlédnutí 8KPřed rokem
Use CoolProp, a library of functions that allows you to determine properties of various gases and liquids with ease. This video demonstrates the basic use of the PropsSI command, then uses the same command to plot constant temperature lines on a pressure-specific volume chart. List of fluids: www.coolprop.org/fluid_properties/PurePseudoPure.html#list-of-fluids List of properties: www.coolprop.o...
First Law of Thermodynamics
zhlédnutí 575Před rokem
Investigate the interactions between heat transfer, work, and the change of internal energy for a simple process.
Specific Heats - Constant volume/pressure
zhlédnutí 3,2KPřed rokem
Derivation of the constant volume and constant pressure specific heat for fluids.
Ideal Gas Law and Compressibility
zhlédnutí 454Před rokem
Under most normal circumstances, the ideal gas law is an excellent tool for determining the properties of a gas. However, we tend to look at odd situations in Thermodynamics. For that reason, we need to look at situations where the ideal gas law may not apply.
Finding Data from Tables (Bilinear Interpolation)
zhlédnutí 1,7KPřed rokem
Examples of using linear and bilinear interpolation to find data from tables.
Linear Interpolation
zhlédnutí 17KPřed rokem
Calculation of intermediate data through linear interpolation.
Python with Google Colab
zhlédnutí 709Před rokem
A basic tutorial on using Python with Google Colab. Covers basic math and plotting.
Bilinear Quad Element - Shape Functions
zhlédnutí 4,2KPřed rokem
Determine the shape functions and derivatives for the bilinear quadrilateral element. Builds off of the Galerkin Method for 2D Solids and Stiffness Matrix for 2D Solids videos. Warning: using the approximate solution may lead to numerical instability. You should always use numerical integration with at least four points (it's really not that bad).
Element Stresses for 2D Solids
zhlédnutí 657Před rokem
Determine the elements stresses, specifically the von Mises stress, for a 2D element. The process described can be used for any element, though discussion of maximum stress on elements with quadratic or cubic strains is not discussed.
Constant Strain Triangle - Example
zhlédnutí 1,6KPřed rokem
Find the stiffness matrix for a single CST element. Follows videos covering the Galerkin Method derivation (czcams.com/video/7bPY3kQDxJI/video.html), the stiffness matrix derivation for a 2D solid (czcams.com/video/v-dcwocLvaY/video.html), and the isoparametric shape function for a CST (czcams.com/video/zf9ucVTlGeQ/video.html).
Constant Strain Triangle - Shape Functions
zhlédnutí 1,4KPřed rokem
Determine the shape functions and their derivatives for the Constant Strain Triangle. This is a continuation of the Galerkin Method for 2D Elements (czcams.com/video/7bPY3kQDxJI/video.html) and the Stiffness Matrix for 2D Elements (czcams.com/video/v-dcwocLvaY/video.html) videos.
Stiffness Matrix for a 2D Solid
zhlédnutí 1,4KPřed rokem
Starting from the results of the Galerkin Method, determine a form for the Stiffness Matrix for a 2D solid. Note that we have stayed general with our shape functions, meaning that our result will work for any element we come up with.
Galerkin Method for a 2D Solid
zhlédnutí 1,4KPřed rokem
Derivation of the differential equation for a 2D solid, followed by the application of the Galerkin Method and integration by parts in 2D.
Linear Algebra - Solving Systems of Equations
zhlédnutí 59KPřed 3 lety
Linear Algebra - Solving Systems of Equations
Wow
Thanx....it is really simple explanation
Got it!
he upgraded the ring
you know it well,thank you.
Thank You Sir
Appreciated it a lot 🙏
is it just me, or he get the wrong power from the hot side wrong? .1kg/s * 4.18 kj/kg*k * 15K = 6.27 kW, not 10.5 kW
how you calculate the ho and hi ??
best explanation
Please explain if possible, the middle support (PIN) should have a resultant moment, isn't it? Because intuitively, P is pushing down, the PIN won't settle and the wall won't let move up either. So, there should be a bending effect on the PIN.
Yes, it was informative. Thank you!!!!!!!
good writing
actually we were here for you going to solve m1 and m2 re arrangment.
Who here memorized the specific heat of water?
What a great explanation. Regards!
Thank you so much ❤
The only person who explained well this topic
Nice video sir, thank you very much.
you make the whole deviation of specific heat so clear, tysm!
Excellent. What is A0, A1 AND A2 IN MOMENT EQUATION
Thanks brother
finally!!! this saved my life
Please the value of P is rather 0.1667 and not 0.22
Bro u are my savior
Thanks 🙏
Sir why Fx1 the value is more larger than the actual force?
thanx
This was very hopeful ... Many thanks, my good sir.
thanks these lectures helped me to know clearly about the matrix. understood clearly...the steps easily
Multiplication , addition, subtraction of a matrix with a constant is what you would think it is?
the first one was my old phone password o_0
Thankyou 🙏🙏
This was very helpful, thank you for posting ^-^
Best video I've seen on this subject BY FAR. 've been stuck on a problem for 3 days and this has really helped. Now I just need to get my head around how to do this with 6 degrees of freedom and I should be able to move on with my project! Thanks!
❤❤❤
Amazing
Machane you helped more for my finals
Beautiful. Thank you sir
are you perhaps patrickJMT? your handwriting is so similar
🎉
Sir, While calculating sin x, Why we have considered it as negative? Please elaborate...
thank you, this is super helpful!
I can't believe you just taught me matrices multiplication 🙈 wow
51,3?
give this man a medal
Thanks
How to find coefficient of heat transfer
can you share your code in colab?
can you talk more about q and w as quantities?