Effect of heat source on the growth of dendritic drying patterns

Pramana

Jayashree A Dharmadhikari⁴  Shruthi Radhakrishnan²  Aditya K Dharmadhikari³  Deepak Mathur³  Swadhini Sahu²  Kiran M Kolwankar1¹  Pulkit Prakash² 

[1] Department of Physics, Ramniranjan Jhunjhunwala College, Ghatkopar(W), Mumbai 400 086, India$$;Department of Physics, University of Mumbai, Vidyanagari, Santacruz East, Mumbai 400 098, India$$;Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400 005, India$$;Department of Atomic and Molecular Physics, Manipal University, Manipal 576 104, India$$

关键词: Dendritic solidification;    branched structures;    diffusion limited growth.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

Shining a tightly-focussed but low-powered laser beam on an absorber dispersed in a biological fluid gives rise to spectacular growth of dendritic patterns. These result from localized drying of the fluid because of efficient absorption and conduction of optical energy by the absorber. We have carried out experiments in several biologically relevant fluids and have analysed patterns generated by different types of absorbers. We observe that the growth velocity of branches in the dendritic patterns can decrease below the value expected for natural drying.

【 授权许可】

Unknown