Need help trying to mimic a phenomenon associated with air pressure

[Ayrflyer]

Good day everyone, Hope all is well.

Bare with me as I am beginner in the field of understanding air pressure. But could really use help with a certain phenomena that I have been observing with an experiment I have had success with. I am then attempting to build an apparatus that mimics its effects.
I have attached a very basic picture of my experiment that I stumbled upon.

In the picture you will note (C). (C) represents a flat surface. (B) represents a slit about a half of a centimeter in width and is level with the flat surface (C). (A) represents a hallow sphere cut in half so the inside is full of space.In my experiment I run (A) in the direction of the arrow on the picture so that it runs over the slit and then I bring it back the other way. I do this multiple times and seem to be causing what we think is flash evaporation (could be very well wrong) when the flat surface has water over it.
To further study this phenomena we are attempting to understand first what is exactly happening inside the half hallow sphere when it runs past the slit? and 2) What happens inside the sphere once it passes the slit back onto the flat surface where no air is getting out? I presumed much like water passing in a Venturi that it was a low pressure drop. But creating multiple models that induced low air pressure/high air pressure/cyclones/ turbulent air etc have not yielded the results I can get from this simple experiment in the picture. I am now hypothesizing it is rapidly changing from high pressure to low then back to high again. Either way then how would I create an apparatus to mimic that?

So far my models involve me blowing air through a tube or sucking air through the tube that is attached to a container which has variations of tubes shapes etc that are trying to induce different pressures.

If any of you can help that would be greatly appreciated and if you have any good inquiries on an apparatus to create that mimics the effect that is happening in the picture I have attached. I would be willing to show my gratitude with a thank you in the form of a little financial incentive. Not much but a token of my gratitude. I have created so many models and never seem to get it.

Thank you to anyone who takes the time to read this and help me out.Cheers,

Ayrflyer

 

[Andrew Mason]

Summary:: Trying to understand what is happening to the air pressure in a certain experiment and then to mimic that outcome with an easily mobile apparatus.

Good day everyone, Hope all is well.

Bear with me as I am beginner in the field of understanding air pressure. But could really use help with a certain phenomena that I have been observing with an experiment I have had success with. I am then attempting to build an apparatus that mimics its effects.
I have attached a very basic picture of my experiment that I stumbled upon.

In the picture you will note (C). (C) represents a flat surface. (B) represents a slit about a half of a centimeter in width and is level with the flat surface (C). (A) represents a hallow sphere cut in half so the inside is full of space.

In my experiment I run (A) in the direction of the arrow on the picture so that it runs over the slit and then I bring it back the other way. I do this multiple times and seem to be causing what we think is flash evaporation (could be very well wrong) when the flat surface has water over it.

Hi Ayrflyer. Welcome to PF!

If you are going to do experiments you have to follow basic rules. You must state what you did, what you observed, and what you conclude. You have sort of explained what you did and what you seem to conclude (flash evaporation) but not what you observed. What is it that you see and measure?

AM