Debajyoti karmakar
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- TL;DR
- A query exploring if high initial kinetic energy in hot water drives rapid convective circulation loops that optimize surface cooling rates and bypass the density stabilization threshold at 4°C to trigger faster overall freezing.
Hello everyone,
I am researching the thermodynamic variables involved in the Mpemba effect, specifically focusing on the fluid dynamics of natural convection loops.
A fluid starting at a significantly higher initial temperature will exhibit substantially higher initial kinetic energy and vigorous convective cycling compared to a fluid starting at room temperature.
I am trying to understand a scenario where the top layer of water in contact with a cold boundary experiences a rapid localized increase in density, causing it to drop and establish a highly active circulation loop. In a hotter fluid, this rapid shuffling of layers maximizes the surface boundary's exposure to the cold, maintaining a high cooling rate. Conversely, in a room-temperature fluid, the lower initial temperature differential results in sluggish convective circulation, slowing down the overall heat transfer to the surroundings.
My question regarding fluid mechanics is this: Can the fluid momentum generated by this initial, vigorous convective cycling carry enough kinetic energy to bypass or delay the stabilization that typically occurs when water reaches its maximum density peak at 4°C?
If anyone could point me toward existing textbook concepts, papers, or models that look at convective momentum vs. density changes during cooling, I would greatly appreciate it!
Thank you!
I am researching the thermodynamic variables involved in the Mpemba effect, specifically focusing on the fluid dynamics of natural convection loops.
A fluid starting at a significantly higher initial temperature will exhibit substantially higher initial kinetic energy and vigorous convective cycling compared to a fluid starting at room temperature.
I am trying to understand a scenario where the top layer of water in contact with a cold boundary experiences a rapid localized increase in density, causing it to drop and establish a highly active circulation loop. In a hotter fluid, this rapid shuffling of layers maximizes the surface boundary's exposure to the cold, maintaining a high cooling rate. Conversely, in a room-temperature fluid, the lower initial temperature differential results in sluggish convective circulation, slowing down the overall heat transfer to the surroundings.
My question regarding fluid mechanics is this: Can the fluid momentum generated by this initial, vigorous convective cycling carry enough kinetic energy to bypass or delay the stabilization that typically occurs when water reaches its maximum density peak at 4°C?
If anyone could point me toward existing textbook concepts, papers, or models that look at convective momentum vs. density changes during cooling, I would greatly appreciate it!
Thank you!