Dear all
I'm designing an exhaust system for a wood working facility. Please correct me if I'm wrong as I'm new to this industry:
The system needs about 4.8 m^3/s airflow (with main duct velocity of 20m/s and branch velocity of 23 m/s). The total pressure drop due to the ducts and...
This might be simple but I can't remember how to do it.
problem: we have 2 tanks. One filled with atmospheric air at 1 bar and the other is vacuum. The two tanks are connected by a rigid pipe which has a valve. I open the valve and air flows to the vacuum tank. How do I calculate the air...
Thank you for your reply but don't have access to the first and 3rd papers.
You are right, but what if we use a reflective surface? I found these papers too but I don't know how to put them into practice. If you or anyone else wants to share knowledge you are most welcome. Unfortunately, many...
Dear all
I am working on a project and I need to measure the surface roughness of a specific type of wood. I don't want to make things complicated because I have to make the instrument myself. I think an interferometer can help me to measure surface roughness but I really don't know how to...
Thank you for the reply
The code is quite long and complicated. I can give you a simpler example. Imagine we want to simulate a bouncing ball where input3 defines number of bounces. We have equations of motion, impact phase and event. The event occurs when y=0(the ball contacts the ground)...
I have an ode function which is of the form:
function [output]=Fun[input1,input2,input3]
which is solving a set of non-linear differential equations. input1 and 3 are fixed but input2 is a variable. Say:
input1=3; % a constant
input3=20;
input2=[2 4 6 8];
function Fun is being...
Did you actually look at what I wrote for you? I wrote the final answer for you too.
You have t2+4=x+5 so you get: dx/dt=2t → dx=2tdt
so you have t2 in your nominator and not t.
OK and how exactly are we supposed to get alpha? I can think of a solution but my answer doesn't match what the problem says. Here is what I think:
The axle rotates 8rev. I assume the height h that mass B falls down is also 8rev. That is:
h=8(2πrB) , by B I mean diameter of axle
The...
Find final omega at the end of 8 rev using:
ω2-ω02=2αΔθ. (ω0=0).Make sure to convert revolution to radians.
Find Io=k2mA, k: radius of gyration
T=0.5mAvA2+0.5Ioω2
Since A doesn't have any translational motion, vA=0. Now you can find T(kinetic energy) easily.
For part B, ƩMo=Ioα...
We need angular acceleration to find angular velocity at the end of 8rev. I'm pretty sure they have assumed α is constant, so we shall use ω2-ω02=2*α*Δθ. But the info on mass B is totally irrelevant.
If you use t=sqrt[x+1], you will get :
I=2∫t2/(t2+4)dt . Now change the nominator, separate and integrate:
I=2∫t2/(t2+4)dt=2∫(t2+4-4)/(t2+4)dt=
2∫[1-4/(t2+4)]dt=2[∫1dt-4∫dt/(t2+4)]= 2 Sqrt[1 + x] - 4 ArcTan[Sqrt[1 + x]/2]
Bodies can both refer to particles and rigid/non-rigid materials. What he meant by coefficient of elasticity ε was actually coefficient of restitution and particles can have ε too. I don't think he meant Young's Modulus(elastic modulus) as that doesn't make sense for this kind of problem. He...
I'm not sure how FE softwares work exactly , but obviously you need to give it some input and define some constraints for it to work.
Again it depends on the problem. I don't think you can solve what OP says by FE either because we have no info. I mean even if we consider other than...
I'm not so sure what you mean exactly because apparently N is the normal force but then you are adding it in x-direction(if by x you mean horizontal line) . I also think you must differentiate between what you mean by normal force N and ground reaction force R. Ground reaction force R is the sum...