ketchup: how to keep the non-newtonian fluid from messing up your next bbq - glass water bottle with lid
This time of year in the northern hemisphere: the sun comes out, the grass starts to turn green, and people are preparing for the first outdoor barbecue (Or will soon).
But every year at those barbecues, we have the same annoying problem: how to get the needed sauce on these barbecues
Give away hot dogs and burgers without causing confusion.
As the video from the University of Melbourne reminds us, this problem arises because ketchup and other condiments are called soft solids that produce pressure liquids or non-
Other examples include industrial products such as mud, cement or mortar, and toothpaste.
And Silly Putty.
Unlike water, it is easy for water to flow out of the bottle, tomato sauce as a non-
Newton fluid, prefer to live in bottles, especially in glass bottles.
So tomato sauce is actually a liquid with a bunch of things floating in it, and all the suspended parts form a network.
The only way to make it flow is if you, the hungry person at the time of the barbecue, apply a force, like your hand, to break the glass bottle of the suspended solid network.
Without this power, ketchup will be like solid.
In fact, there is an entire area called flow devoted to the study of these fluids, whose name is derived from Newton's law of viscosity. Non-
There is no constant viscosity of Newton fluid;
Their flow resistance varies with the magnitude of the force applied. When a non-
Newton fluid yields to pressure and begins to flow, and the viscosity decreases with the speed of flow.
So the greater power (
Tomato sauce bottle)
A viscosity similar to water will be produced, resulting in an explosion of ketchup and a sticky hand. But fear not.
With the University of Science and Melbourne, you can take authoritative measures to solve this problem.
Their suggestions are: 1.
Shake the bottle with the lid.
Giving the bottle a good shake helps the particles in the bottle mix together and re-mix
Homogenize, treat tomato sauce that is too water or too dryout. 2.
Open the lid and pour the bottle over.
This takes the contents of the bottle to the outlet point of the bottle.
If the bottle is close to empty, this may also require additional force at the other end of the bottle to guide the sauce to the bottleneck. 3.
Best part: pour some on your hot dog or burger!
To get the ketchup out of the bottle, some force needs to be applied, but not too much, otherwise you'll have sauce everywhere.
Remove the cap, turn the bottle to the food that needs the sauce, and continue to turn at a certain angle until the bottle begins to flow.
If the jam does not come out of the bottle when the bottle is almost upside down, it needs to give it more strength.
To do this, keep the bottle at 45-
Angle of degree, providing a firm faucet at the top of the bottom;
In order for the sauce to flow, you basically balance the applied force and the viscosity of the sauce.
So if your future is burgers and hot dogs, use these tips to perfectly remove all types of condiments from glass bottles and show off to your friends!