Here is the first part of a tutorial which shows how to build a two dimensional heat transfer model in Excel. The presentation shows how to partition a square plate in elementary elements on which the simplest form of the heat storage and heat transfer equations can be applied. The numerical form of the final temperature formula is derived . Building… Read More... "Building a Dynamic Two Dimensional Heat Transfer Model – part #1"
Here is a basic 2D heat transfer model. The first five worksheets model square plates of 30 x 30 elements. The last worksheet is the model of a 50 x 50 plate. You can modify the initial temperature by hand within the range C21:AF240. It is also a diffusion model. It uses the storage and transport equations derived in the previous tutorials.… Read More... "A Basic 2D Animated Heat Transfer Model (a diffusion model too)"
This is the last tutorial of the series and it shows how to implement the previously derived formulas into a spreadsheet model. The spreadsheet formulas, the macros and charting of the dynamic data is explained. [sociallocker][/sociallocker] Animated heat transfer modeling for the average Joe – part #4 by George Lungu – This is the last section of the beginner series… Read More... "Animated Heat Transfer Modeling for the Average Joe – part #4"
This section shows how to model heat transfer in a linear bar by dividing it in elementary sections in which the basic linear equations introduced in the previous tutorials can be used. Animated heat transfer modeling for the average Joe – part #3 by George Lungu – This is a new section of the beginner series of tutorials in heat… Read More... "Animated Heat Transfer Modeling for the Average Joe – part #3"
This is a continuation of the first part of the beginner series of tutorials in heat transfer modeling. The first part introduced the reader to the concept of heat capacity (being analogous to the electrical capacity). This section continues with the concept of heat conductance which is analogous to the electrical conductance. Ohm’s law applies. Toward the end, the principle… Read More... "Animated Heat Transfer Modeling for the Average Joe – part #2"
This the first tutorial on modeling heat transfer at a very introductory level. If you follow this series and spend your own effort in developing your own models you will be able to model heat transfer in very complex shapes (1D, 2D, 3D) in a short time and with the basic understanding of a 12 year old school boy. Animated heat transfer modeling… Read More... "Animated Heat Transfer Modeling for the Average Joe – part #1"
Hi guys, Here is a 1D dynamic model I built today simulating heat transfer in a 21-segment bar. Just click on the orange “Demo” button for a quick demo. Hitting “Reset” sets the 21 segments of the bar to the initial conditions which is a fully customizable initial temperature map. Clicking “Start/Pause” starts the simulation and you can watch the bar temperature profile… Read More... "A One-Dimensional Dynamic Heat Transfer Model – a diffusion model"
This last section of introductory PLL modeling shows how to upgrade the model with adjustable scale charts for three voltage signals within the loop. The model also shows how to create a Lissajous based phase display. [sociallocker][/sociallocker] How to Model a Phase-Locked Loop (PLL) in Excel – part #4 -This is the continuation of part #2 of the PLL tutorial. The previous… Read More... "How to Model a Phase-Locked Loop (PLL) in Excel – part#4"
This is a continuation of the PLL series of tutorials and it takes the recursive numerical formulas derived in the previous section, implementing a dynamic spreadsheet model with help from a copy-paste loop type of macro. This macro emulates the behavior of the phase locked loop model in time. At this point, the model is functional. Charting options for the waveforms… Read More... "How to Model a Phase-Locked Loop (PLL) in Excel – part#3"
Both frequency and phase modulation are important not only in electronics but also in science and physics in general. It seems like a trivial chore but when I first tried to model such a signal some time back I hit a hard wall. Our minds easily understand kinematics concepts such as coordinate, speed, acceleration and the relations between them in… Read More... "How to Model a Frequency Modulated (FM) Signal – an insight"
This is a continuation of the PLL series of tutorials and it starts by implementing and testing the low pass filter created in the previous section. After that, the block diagram is updated and the presentation begins to show how to build the PLL model in a worksheet using the existing LPF formulas. [sociallocker][/sociallocker] How to Model a Phase-Locked Loop (PLL) in… Read More... "How to Model a Phase-Locked Loop (PLL) in Excel – part#2"
A Phase-Locked Loop is a type of electronic circuit. It generates an oscillation with the same frequency as a reference oscillation and a relatively constant phase difference with respect to the same reference. The applications spectrum of such a circuit are extremely wide. Signal modulation, demodulation, detection and filtering, frequency conversion and synthesis are just a fraction of what this circuit can do.… Read More... "How to Model a Phase-Locked Loop (PLL) in Excel – part#1"
The previous section explained the VBA upgrades needed to make the score functional and new-game and end-game sound effects were added. This tutorial shows how fix some previous bugs and create a “demo play” option which means that both bats are automatically run by worksheet logic. This is the final part of the of the Pong tutorial series. [sociallocker][/sociallocker] Excel PONG Tutorial #10 – adding… Read More... "How to make a game of PONG in Excel – part #10 – final"
The previous section explained how to add a game score in the upper part of the pong court. This section (which is a continuation of part#8) will explain the VBA upgrades needed to make the score functional. We will add here new-game and end-game sound effects too. Next tutorial will explain how to create a “demo play” option which means that both bats… Read More... "How to make a game of PONG in Excel – part #9"