The phrase "a visual demonstration of" is correct and usable in written English.
You can use it when describing an example or illustration that is presented visually to explain or showcase a concept or process.
Example: "The teacher provided a visual demonstration of the scientific experiment to help the students understand the procedure better."
Alternatives: "a visual representation of" or "a graphical illustration of".
A visual demonstration of the association of detected genes with the viral decrease is demonstrated by a comparison of patient clusterings.
Particularly popular was a visual demonstration of the tar in cigarettes.
His wife has posted their extraordinary story — including a visual demonstration of how they employed mirror therapy — on their blog.
During my talk with Mrs. Kenison after dinner, the whole family gathered in the living room of the main house to watch Fuller put on a visual demonstration of his mathematics.
If nothing else, it is a visual demonstration of the fact that a work life balance can be achieved, and also encourages other members of staff to actively strive towards achieving more.
(The high point of the shtick is a visual demonstration of how some DVD's squish wide-screen movies to make them fit square TV sets. Julia Daveve! You're anamorphic!" Dave: "Oh, no -- I had that treated").
The British government is touting his project as "a striking, visual demonstration of the U.K. as a creative and innovative nation".
A simple visual demonstration of different needle sizes during an office visit may be useful to reinforce this message.
The BT started with a visual demonstration by the tester of the single test along with an oral instruction on how to perform the test before the children performed the test themselves.
The technique of gel electrophoresis provides a simple, visual demonstration of the variation that exists on the genetic level among individuals of a species.
By simulating varifocal lenses and configuring the parameters of Revit cameras, the developed approach simulates the CCTV screen views to provide a better visual demonstration of the working of the CCTV systems.
