I'd really like to make a a vibrational viscometer which measures the viscosity of a liquid through a resonating rod. The resonant frequency and amplitude is recorded first in air, and then the resonant frequency and amplitude is found when placed in the fluid. The degree in which the frequency shifts and the amplitude is decreased can be used to indirectly measure the viscosity (more viscous fluids absorb more energy).
Now that the science lesson is over, take a look at the diagram in this patent: US4558588A - Vibrating needle viscosity meter - Google Patents
Essentially, it looks like that all that this device is the rod, a magnet on the rod, an electromagnet, and a hall effect sensor. Am I wrong for thinking that this could be designed with an arduino, a mosfet (to drive the electromagnet) and a hall effect sensor? I'm not a fantastic programmer, but I'm thinking that the arduino could simply have a frequency sweep and find the resonant frequency, and spit out on an LCD the resonant frequency and amplitude (relative to the constant driven power). Inside that patent they give details on electronics wiring which might be interesting, but unfortunately I am not at all experienced with reading electronics diagrams. I appreciate any help I can get, thanks!
Please observe this patent: US4558588A - Vibrating needle viscosity meter - Google Patents
It measures viscosity changes in real time by measuring the energy loss (loss in amplitude compared to air) of a resonant vibrating rod dipped in a reactor. It's genius. I cannot believe I've never heard of it before. I guess these things are common on line monitors for thick solutions. In all my lab experience I've only had the pleasure of cone and plates and ubbelhodes. I'm wondering how it's able to achieve viscosity measurement though, this since in addition to the shear force, it is pushing the liquid side to side when it vibrates. Maybe since it is a rod, those cancel out around the circle?
Another earlier patent, US2839915A - Method and apparatus for measuring viscosity, etc., of fluid-like materials - Google Patents
Instead of the rod vibrating back and forth, they use the electromagnet coils to initiate compressive waves through the length of the rod, to try and mitigate the compressive forces. I guess what I'm trying to say is, there's loads of cool information in the patent literature if you can stomach how to read it.
Hello everyone,
I was looking for some answers concerning the Oswalsd’s viscometer and I haven’t been able to find them in google. These are my questions: What kind of liquids can I use with the oswald’s viscometer? I know that it need to be Newtonian liquids but specifically I’m not quite sure, which lead us to my next question. Are transparent, foaming and liquids with high volatile components the only liquids that we can use? And if so, why?
Thank you and sorry for my level of English, it isn't my first language.
In a servo motor viscometer, a spindle is placed in the fluid to be measured. I'm designing one for my physics class and I want it to measure the current going to the servo as a way of measuring the viscosity of the fluid. Obviously the more viscous the fluid is, the more drag on the spindle, and the more current will need to go to the servo to keep it at the constant RPM setting. The current is directly proportional to the viscosity, but how could I calculate a numerical value for the viscosity? Thank you.
Does anyone have a recommendation of an affordable viscometer? Thanks!
The analysts forecast the global blood viscometer market to exhibit a CAGR of 5.71% during the period 2019-2024. The report covers the present scenario and the growth prospects of the global blood viscometer for 2019-2024. To calculate the market size, the report considers the blood viscometer sales volume and revenue.
The projections featured in the report have been derived using proven research methodologies and assumptions. By doing so, the research report serves as a repository of analysis and information for every facet of the market, including but not limited to: regional markets, and application.
Browse Sample of Full report @ https://mindaspiremarketresearch.com/request-sample/report/blood-viscometer-market
Geographically, the global blood viscometer market is segmented into North America, Asia Pacific, Europe, Middle East & Africa and South America. This report forecasts revenue growth at a global, regional & country level, and provides an analysis of the market trends in each of the sub-segments from 2019 to 2024.
- North America (U.S., Canada, Mexico, etc.)
- Asia-Pacific (China, Japan, India, Korea, Australia, Indonesia, Taiwan, Thailand, etc.)
- Europe (Germany, UK, France, Italy, Russia, Spain, etc.)
- Middle East & Africa (Turkey, Saudi Arabia, Iran, Egypt, Nigeria, UAE, Israel, South Africa, etc.)
- South America (Brazil, Argentina, Colombia, Chile, Venezuela, Peru, etc.)
Based on application, the blood viscometer market is segmented into:
- Hospital
- Laboratory
- Clinic
The report also includes a discussion of the key vendors operating in this market. Some of the leading players in the global blood viscometer market are:
- Ametek Inc.
- Anton Paar GmbH
- Beijing Steellex Scientific Instrument Co., Ltd.
- Benson Viscometers Ltd.
- BioFluid Technology Inc.
- Health Onvector Inc
- Lamy Rheology
- RheoSense Inc.
- Thermo Fisher Scientific Inc.
- request free sample to get a complete list of companies
Objective of the study:
- To analyze and forecast the market size of global blood viscometer market.
- To classify and forecast global blood viscometer market based on region, and application.
- To identify drivers and challenges for global blood viscometer market.
- To examine competitive developmen
... keep reading on reddit ➡
Hi,
I'd like to measure viscosity of some creams for an experiment using an Ostwald's Viscometer (The glass ones)..
How is this done? there's no clear explanation
http://imgur.com/a/VpmYT Also, am I missing any parts?
One of my labs involves using a somewhat old school viscometer of this type. It's basically a rotating pendulum where the viscosity of the liquid dampens the amplitude of the rotation. Then you look at the amplitude after one oscillation and look it up on a provided graph. The problem is that measurements with two different diameter bobs in the same oil yield very different results. For instance, the average amplitude for the 1/4'' and 11/16'' diameter bobs were 295.5° and 274°, respectively. The 30 gauge wire was used and these two results are completely out of step. Am I misunderstanding how the graph works?
H. A. Snyder , "Rotating Cylinder Viscometer", Rev. Sci. Instrum. 40, 992 (1969).
http://dx.doi.org/10.1063/1.1684177 (6 pages)
Thanks in advance chaps!
Our team studied the Cylindrical Plunger Viscometer. This is a device which measures the viscosity of fluids using a cylindrical plunger partially submerged in a cylindrical container of the fluid. It is assumed that the gap between the plunger and the container is much smaller than the radius of the plunger to simplify the math. A model is developed by simplifying the Navier-Stokes equations. The gif simulates this model. It is assumed the plunger is submerged a centimeter into the container. The first red line is where an experimenter would start his/her stop watch and the second red line is where he/she would stop his/her stop watch. It will be mainly used to detect small differences in the viscosity of various fluids to see whether or not they contain unsatisfactory levels of contamination.
Here is the simulation: http://imgur.com/51jZS
If I need to elaborate, let me know.
I'm trying to build a cone and plate viscometer for my graduate research. My current plan of attack is to either build the entire set up or purchase a premade cone and design the plate around that. Some of my concerns have to do with the tolerances required to machine the cone. Does any have any experience making this?
I don't want to step on anybody's toes here, but the amount of non-dad jokes here in this subreddit really annoys me. First of all, dad jokes CAN be NSFW, it clearly says so in the sub rules. Secondly, it doesn't automatically make it a dad joke if it's from a conversation between you and your child. Most importantly, the jokes that your CHILDREN tell YOU are not dad jokes. The point of a dad joke is that it's so cheesy only a dad who's trying to be funny would make such a joke. That's it. They are stupid plays on words, lame puns and so on. There has to be a clever pun or wordplay for it to be considered a dad joke.
Again, to all the fellow dads, I apologise if I'm sounding too harsh. But I just needed to get it off my chest.
Do your worst!
