# What is Spiral: Definition and 191 Discussions

In mathematics, a spiral is a curve which emanates from a point, moving farther away as it revolves around the point.

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1. ### Designing a spiral with a certain angle relative to movement direction

I have a disk traveling on the inner blue track (let's say the blue part is the center of the disk). I want to push the disk outside (as the disk is traveling in a circle) to the outer track. The black part is the wall separating the tracks To that end, I've made some calculations, but I have...
2. ### B How does the Paper Spiral work?

Hot air rises due to the candle below. But how does that create a horizontal force, which is needed to produce the rotational torque?
3. ### B Periodic spiral graph interpretation

Could someone explain the geometry of this graph? Why does the radial distance vary non-uniformly? To-wit: Distance from origin to Nov 2020 is much larger than Nov 2020 to Nov 2021 Why are there two areas - one above and one below - the centre line...
4. ### B The Hubble Telescope Images a Magnificent Galaxy With “Flocculent” Spiral Arms

Had to Google Flocculent, adjective having or resembling tufts of wool. "the first snows of winter lay thick and flocculent" having a loosely clumped texture. "a brown flocculent precipitate"...
5. ### Max Compression & Reinstall of Spiral Wound Gaskets -Advice Needed

Would need advise on which is the maximum allowed compression to apply to a gasket according to the thickness of the gasket. If this information is available from the manufacturers, would like to know. Also, if once used, the gasket can be reinstalled and which is the experience about that.

40. ### High temperature spiral sleeves

Hi. I want use high temperature spiral sleeves which should withstand around 300 deg C and I want wrap these sleeves around power cables which are passed in enclosure having thermal block and we will heat this block up to 400 deg C Please suggest me how to overcome and suggest best suitable...
41. ### Unveiling the Mystery of our Spiral Galaxy

How did we know that our galaxy is spiral?!
42. ### ANSYS: How to interpret this remote force on a spiral disk?

Hi! I am new to ANSYS and I am trying to understand a simulation done by some one else. I have a disk with a spiral in it, and it looks like there is a remote force being applied at the centre of the disk, but spread over the entire face. I don't understand how this force is being spread...

Hey there! Usually we learned to calculate (in this case, I learned mostly in square/rectangular shapes), but I would like to ask how to we calculate spiral loadings? How would the load be transferred when the structure is in spiral shapes? Thanks! Here's an example of the structure.
44. ### Direction of Forces on an Euler Spiral Path | Intuitive Explanation

Trying to figure out direction of forces of an object traveling on an Euler spiral path. As an example if you had an astronaut with a jetpack and he wanted to change his direction 90 degrees he could aim his thrusters outward from the center of a circle and he would turn at a constant rate with...
45. ### Spiral time concept - are there any credible......

I was reading a fiction book and they mentioned a fascinating concept described as "spiral time" - are there any credible scientific hypothesis concerning such as thing - no matter how generally outlined? The concept, obviously is that time is neither a unidirectional timeline nor a circular one...
46. ### Spiral heat exchanger - pressure drop?

Hi, I hope this is the right section. I'm trying to figure out a rough estimate of the pressure drop in a spiral heat exchanger. The fluids both being water. My guess it it would be in terms of the surface area of the inside of the heat exchanger, and the flow rate, but I can't seem to nail...
47. ### Design a coil with a variable pitch but a constant length?

I believe what I am attempting to do is not possible but here goes. I want to design a fixed overall length coil which I can manually adjust the pitch on. Optimally one would be able to grab the coil and by twisting it in place would be able to change it's pitch by changing its diameter but not...
48. ### 'curve-in' condition in an equiangular spiral

For any 2 pairs of points (xe,ye) & (xs,ys), I can fit various equiangular spiral through those 2 points based on the equation r = ke^(aθ). A typical one is illustrated below: Then, I can vary the origin of the spiral -> i.e. (xc,yc) to generate another equiangular spiral which passes through...
49. ### Optics cornu spiral and diffraction

Hi, i am in second year of university and doing optics I have a questions in one ofmy assignment : Fresnel diffraction is observed behind a wire 0.37 mm thick, which is placed 2 m from the light source and 3 m from the observation screen. If the light of wavelength 630 nm is used, find, using...
50. ### Prime Number Spiral | Maverick Experiments

I put this on mt web site. it shows a serial of prime numbers. Al http://www.maverickexperiments.com/PRIME/prime.html