The discussion centers on the phenomenon of liquid rings forming under coffee cups, attributed primarily to spilled liquid and condensation effects. Participants noted that both hot and cold liquids can contribute to this occurrence, with hot liquids causing condensation on cooler surfaces. Additionally, residual water from washing mugs can also lead to similar marks if not dried properly. The conversation highlights the interplay between temperature, liquid properties, and surface interactions in creating these visible rings.
PREREQUISITESThis discussion is beneficial for scientists, educators, and anyone interested in the physical properties of liquids and materials, particularly in relation to everyday phenomena like condensation and fluid dynamics.
Can you please restate the question, I am struggling to understand what you are referring toZohar said:Summary:: How does hot fluid comes down to the surface of the glass it's in?
Some of us may use coffee coaster for our drinks. I was always wondering about that phenomenon and failed to find something on the net yet.
Zohar said:Haven't you seen a circle of fluid under a cup of coffee? How does it happen?
Zohar said:How does it happen?
I wonder if you leave your mugs on the side of the sink after washing them up. A small amount of water can stay in the inverted bottom and that can turn up on the table top. Experiment to find if drying up the mug totally will solve the problem. I can't think of any other reason.Zohar said:a circle of fluid under a cup of coffee?