Hello all. I recently obtained some SEM images of some particles I am researching and have been trying to come up with a way to get a histogram of the particle size distribution; however, I have run into a few issues. I am currently trying to use MATLAB to do edge detection of the particles and calculate the size distribution this way but a lot of my samples have irregular-shaped particles and MATLAB does not do as well of a job distinguishing particles from one another. Are there any specific tips or tricks to go about determining the size distribution? Any existing software for this? Thanks!
Hey everyone!
So lets say I grind 30 gr of coffee and brew a V60.
second I grind more coffee (40 gr) in a bit finer grind size, and use sieves to reach 30 gr of coffee with smaller standard deviation (by filtering the super fines and super coarse particles), then I brew a v60. (I used smaller grind size to keep the same brew time)
third let's imagine I have a magical grinder that grinds 30gr in the exact same particle size, then I brew a v60.
All three are same in brew time, but different in particle distribution. My question is that how these three brew compare to each other? Is it safe to say that the third brew is the cleanest cup? Can we just say the more consistent the grind size, the better? Or the fines (having a range of particle sizes) could benefit the brew somehow?
Any input would be appreciated!
When calculating for the PSD's Cc and Cu, we need to know first D10, D30, and D60. So to get these values, I must interpolate within the PSD right? I'm not supposed to eyeball whichever sieve is the closest to 10%, 30%, 60% passing, no? Sorry if this is a dumb question, the professor hasn't really discussed this method to us.
I'm looking for the particle size distribution in soil. Does anyone know anything about that? is there a more relevant subreddit for my question?
Hey guys,
I want to determine the particle size distirbution of activated sludge with granular sludge. Is there a way to measure it trough the sink rate with a easy apparatus when I know the sink rate of every particle?
MONTREAL, March 11, 2021 (GLOBE NEWSWIRE) -- PyroGenesis Canada Inc. (http://pyrogenesis.com) (TSX: PYR) (NASDAQ: PYR) (FRA: 8PY), (the "Company", the “Corporation” or "PyroGenesis") a Company that designs, develops, manufactures and commercializes plasma atomized metal powder, plasma waste-to-energy systems and plasma torch products, is pleased to announce today that the European Patent Office has issued its intent to grant PyroGenesis a patent based on its prosecuted application for a “Plasma Apparatus for the Production of High Quality Powders at High Capacity”.
This patent relates to the production of high purity spheroidal powders for use in additive (3D printing) manufacturing, but which can also be used in hot isostatic pressing (HIP). Specifically, this patent aims at providing a simplified device geared to increasing productivity while at the same time allowing for further control over particle size distribution, thereby reducing overall costs. This patent has been filed for patent protection in an additional six different jurisdictions.
“European patents provide protection not only in the 38 member states of the European Patent Organization, but also in two extension states plus four validation states. This represents an area with approximately 700 million inhabitants1,” said Pierre Carabin, Chief Technology Officer of PyroGenesis. “This new addition to our intellectual property portfolio brings the total number of issued and pending patents held by the Company to 124, which is a historical high. We currently have 100 patent applications in progress, covering 19 families of invention. When combined with our significant know-how and trade secrets, we are continuing to create a formidable barrier to entry in the markets we serve.”
1 https://www.epo.org/about-us/at-a-glance.html
“This European patent will further strengthen
... keep reading on reddit ➡Hey folks, I know there’s many articles comparing the two and saying they’re comparable in almost all aspects. However this is all very qualitative and not quantitative.
Has anyone done a grind size particle distribution comparison between the two grinders? Tried looking for it but there doesnt seem to be one
Appreciate if anyone has any info on this!
Hello guys, I'm new to CFD and have a question concerning the particle size distribution of my lagrangian phase.
I'm working with Starccm+ and instead of having the same diameter for all injected particles I want to create a log-normal distribution. For that I have to give the following values: Min, Max, Mean size, Standard deviation. My mean size equals 100um with a standard deviation of 1. However somehow when I'm plotting the particle diameter of my particle tracks they all have the same size (roughly the mean value). So my questions:
1.) Whats happening here?
2.) How can I plot my particle diameter (in my scene)? And how can I plot the PDF of my particles?
Really hope somebody can help me, thanks a lot in advance
Click through -- three images of data. Data is not mine - just sharing as I think this is very useful info. OP is marksalo53 on Instagram. For reference, the wilfa uniform costs about $370. I have seen a one person note some frustrations with fines with the comandante. I know some beans vary in this respect. You can see this reflected some in his data. Two beans seemed to have quite a bit more fines than the others. He links to a youtube of his sieving method for any interested.
Hi, I'm trying to determine the maximum packing fraction of a sample with large particle size distribution of 90 micron to 700 micron. I was wondering if anyone can point me in the right direction.
Edit: Hey all. May thanks for all your help. I am still reading up on it and will let you know when I reach a conclusion.
Hi, My lab works on investigating non-reacting fluid flow phenomena in nozzles/atomizers. I have spray drop size (drop size and number of drops) data in different experimental conditions. I want to understand how to find out different distribution functions (Normal, Log-Normal, Nukiyama-Tanasawa, Rosin-Rammler, Modified Rosin-Rammler and Upper Limit) from those data. I am giving a sample histogram here: https://www.dropbox.com/s/iimac3wwwum9tfd/sample.jpg?dl=0. If someone can help me with method and formulas, that will be very helpful. Thank you.
As the grading curve goes through those points; D60, D30, and D10, but I have to approximate where the curve goes through, do I estimate best I can the value for these based where the approximate line goes through?
Hey guys,
i'm facing trouble transforming a given number-based particle size distribution to a mass-based one.
Let's say we have the following bimodale distribution as a density-function:
I know how to get from density to cumulative an vice versa. But how do i get from number-based to mass-based and vice versa.
I also do know how to do it numerically. But i need to do it without any numbers or equipment.
Any help appreciated.
Edit:
This images visualizes the difference between a number based and a mass based distribution
Here the cumulative functions are shown, that are easily derived by integrating the density functions over the diameter.
Could you guys please help me finding this one? I have already searched at scimag/libgen and scihub and haven't found anything.
A Kravchenko, R Zhang - Soil Science, 1998.
Ps: Sorry for capital letter, didn't see, it was pasted.
I have just started a manufacturing business that Calcium carbonate through grinding mill. In our local market our product fineness is measured in mesh. For example, we have 400 mesh, 600 mesh, and 800 mesh fineness of calcium carbonate. In an international market their mesurement is different.
They have same product but expressed in microns and topcut with Dvalue. Please, check the particle size. For example,http://www.baolinhjsc.com.vn/action/3/c/CaCO3-Powder_355/
My university's lab has a Zetatrac particle size analyzer that has been collecting dust for a few years. I had made some silver nanoparticles in the lab and I wanted to test this machine out by trying to find the particle distribution of the nanoparticles. The graph I was presented with is here. I think the %Channel is the amount of particles that lie between the channel, or particle size points, but I have no idea what %Retained is.
I have just started a manufacturing business that Calcium carbonate through grinding mill. In our local market our product fineness is measured in mesh. For example, we have 400 mesh, 600 mesh, and 800 mesh fineness of calcium carbonate. In an international market their mesurement is different.
They have same product but expressed in microns and topcut with Dvalue. Please, check the particle size. For example,http://www.baolinhjsc.com.vn/action/3/c/CaCO3-Powder_355/
