# What is Engineering and design: Definition and 18 Discussions

The engineering design process is a common series of steps that engineers use in creating functional products and processes. The process is highly iterative - parts of the process often need to be repeated many times before another can be entered - though the part(s) that get iterated and the number of such cycles in any given project may vary.
It is a decision making process (often iterative) in which the basic sciences, mathematics, and engineering sciences are applied to convert resources optimally to meet a stated objective. Among the fundamental elements of the design process are the establishment of objectives and criteria, synthesis, analysis, construction, testing and evaluation.

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1. ### Engineering Building a peripheral for obtaining data from water

I'm working for a project with a goal of analyzing data obtained from a device that extract data from bodies of water, such as bacterias found, the chemical levels, etc. I've been instructed to use existing equipment for it to work. What I've been recommended to use include: bateries, solar...
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### What are Joe's interests and goals as a new member and citizen scientist?

My name is Joe, I'm 36 years old and currently between work. I live in The city of Erie, Pennsylvania. My interests are in the phields of electricity, physics, chemistry, and all engineering principles related. As I am only a high school graduate with no formal training, my education is self...
3. ### SolidWorks Sketching Visual Problem

Hi Everyone, I could use some help in SolidWorks, when I go to sketch geometry, the software creates a lot of lines that extend off the starting point and they don't go away until I snap back to the starting point. I have an image attached to show what is happening. This creates a problem...
4. ### Agitator Torque Calculation

Hi All, I must calculate the torque and for an agitator motor. An anchor type agitator/scraper, removing crust off the edge of a tank. My instinct is the max or startup torque will be = (Moment of Inertia) x (Angular Acceleration) + (Drag force of the submerged impeller)* Max radius +...
5. ### Elevator Frame Design: Can It Stand Alone?

Hello there, I am wondering, if I were to build an elevator in a building, is it possible if I build the elevator frame (and rails) without using the rail bracket? The weight of the cart plus the contents would be supported by only 4 steel columns fixed to the ground. I know it is a silly...
6. ### Heat transfer through a MultiLayer Cylinder (find the Temperature inside)

Hello, I am a Mechanical Engineer a little out of practice on Heat transfer. I am trying to solve this problem. It must be solvable but i have yet to find right equations online. I have a multi Layer Cylinder made up of C350 marraging Steel,Zinc Alloy-12 , then 6061 Aluminum T6. All that is...
7. ### Other Last year of my Ph.D, and having a crisis about my work (data science)

Hi all, I just want to gain some perspective as I am sure there are people in the same boat or have been where I am. I am in the home stretch of my Ph.D in Biomedical Engineering, I have manuscript published and a couple more in the pipeline. I work in big data and how to use it to come up...
8. ### Mechanism with a linear actuator

Designing a machine. For it to work properly there would need to be a mechanism that connects the linear actuator to the stand that would allow for the actuator to move horizontally relatively freely with applied forces at the bottom, when there is simultaneously a downward applied force by the...
9. ### Force exerted by the abdomen on our vest

How to calculate the force or pressure by the movement of the abdomen (due to inhalation and exhalation) on the vest(tight T-shirt for example) that we are wearing ?
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### How to pump liquid from vacuum to atmosphere

Greetings, The application is a wiped film evaporator (~1.2-1.5 kg/hr throughput). The concentrate and the distillate gravity feed round bottom flasks. I'm not worried about the cold-trap waste. The evaporator volume is under vacuum (~0.003Torr). I want to pump the liquid from the...
11. ### Thermodynamics of an Arctic greenhouse?

For a business project, I'm looking into the viability of a greenhouse situated in Canada's far northern town of Iqaluit. The problem is how to mathematically simulate the internal air temperature of the greenhouse. What I already have are detailed 3D renderings of the greenhouse as well as all...
12. ### Mean Radius of Annulus with Bolt Hole Pattern

Hello all, I am trying to remember (I did it in Uni) how to calculate the effective mean radius of an annulus that contains a pattern of holes on a PCD. Consider the following image (pinched from: https://www.solenoid-valves.com/ ): If one was to vary the value of PCD, then the effective...
13. ### Physics equations used in real world photonics problem?

We typically solve idealized problems in physics coursework. How about when we deal with real world Photonics Industry Problems, what Physics equations we will be talking of here?
14. ### Food Chemist vs. Chemical Engineer- Help

First, thank you for taking the time to read this. I need some guidance as I am inventing somewhat of a new edible product. Curious as to if someone can point me in the right direction for the type of chemist I should actually be looking for. At first I was under the impression that it would be...
15. ### How Do I Effectively Post on Physics Forums?

Hi There, Newbie to the forum, I work as a design engineer for a company called Helical Technology. Studied Engineering with honours in Motorsports at uni, recent graduate :) looks like an interesting forum! hopefully I can help with some queries as I hope you guys can help me with mine! thanks!
16. ### How TO make a variable 3D metal box

Hi i want to know how to make a 3D metal box whose length, width, and height i can change. For example, i have a box of 3 m x 3 m x 3 m. i should be able to extend any dimension by a maximum of 1 meter i.e 4 meter (say). I want to use this to store items whose size is unknown, but the limits of...
17. ### Design a New Power Plug to Reduce Copper Consumption

I'm a student from Newcastle University from Singapore Institute of Technology (A new launched University in Singapore) and am majoring in Electrical Power Engineering. My current final year project requires me to research on BS1363 and try to reduce the amount of copper usage as we know that...
18. ### Measuring Velocity based on change in Pressure

Homework Statement There is an air-tight 1L Canister filled with 90% water and 10% N2O. This canister is attached to some clear tubing which is not entirely air-tight. At the end of this tubing are some tungsten particles averaging ~1µm in diameter with total mass of 60mg. The contraption is...