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Showing posts from January, 2020

Nature and Serenity

Today, I will not write about Physics, but rather write about myself being around nature. It is always wonderful to look around and gaze at the sky or river or the mountain. It brings an immense amount of peace and serenity within me. I feel like though I was around nature but couldn't feel until I was left alone. The observation put me in the chain of thoughts that sometimes also make me lost somewhere. Boat and tree directing towards each other at Daewangnam Park, Ulsan The serene beauty of nature also tempts me to think about the responsibility that I need to take for nature. Definitely, it's the climate and pollution, we must do something to make it stay always beautiful.

Korean noodles and Entangled polymer

I finally learned to use the chopstick to eat Korean noodles after a few attempts. The picture showing the noodle trapped between the chopsticks reminds a fundamental principle that DeGennes invoke to understand entangled polymer. In Soft-Matter Physics, polymers are often modeled as a long curly chain that gets entangled. The noodles dip in the soup is the best analog of polymer in a solution. If the noodles are shorter chain then they don't get entangle and if they are long-chain they can entangle.  This property is very similar to what is known for the polymer in a solvent. Korean noodle wrapped in Chopstick PS: I kept a text as small as possible and not technical. I try to record the aspect of Soft Matter that I experience during normal life.

Ilasn Beach and Granular Physics

A idle boat at the entrance of Ilsan beach Today I visited Ilsan beach located in the south of the Republic of Korea, the atmosphere was soothing with a beautiful ambiance. I was passing through the coast and taking the pictures of surroundings. I notice two important phenomena quite familiar in Soft Matter Physics - (i) granular dilation and (ii) Hydrodynamic instability. Ripples on the surface of the sand in the beach (hydrodynamic instability)   Human foot mark on the surface of the sand in the beach (Granular dilation)  I was amazed, though I went to sea beaches several times but never experience such joy. In granular physics, researchers are trying to understand the shear-induced expansion of granular material and the formation of ripples due to the granular flow. These serene observations are wonderful source of a quest for the researchers.  Finally, I was also able to visualize the natural phenomenon that is well documented in the literature of Phy...