{"id":16,"date":"2023-11-03T19:29:55","date_gmt":"2023-11-03T19:29:55","guid":{"rendered":"https:\/\/www-cxcp1.tifrh.res.in\/~perlekar\/?page_id=16"},"modified":"2026-04-01T04:12:02","modified_gmt":"2026-04-01T04:12:02","slug":"research","status":"publish","type":"page","link":"https:\/\/www.tifrh.res.in\/~perlekar\/","title":{"rendered":"Research"},"content":{"rendered":"

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Multiphase flows<\/h3>\n

Fluid flows are ubiquitous in nature. In most cases, the fluid consists of more than one component (e.g., dilute polymer solution, dust in air, oil-water emulsions). We conduct state-of-the-art numerical simulations to gain insight into multiphase fluid flow phenomena. The two main directions of research that are currently being pursued are:<\/p>\n

<\/h4>\n

Bubbly flows<\/h3>\n

The flow behind an array of cylinders or a grid, either moving or stationary, provides an ideal testbed to verify and scrutinize the statistical theories of turbulence. What is the flow generated when a fluid is stirred by a dilute suspension of bubbles as they rise due to buoyancy? We address this question using theoretical tools and large-scale numerical simulations.<\/p>\n

\"\"<\/p>\n

Figure 1:<\/b> Pseudo-color visualization of the z-component of the vorticity field. The bubbles are represented using gray contours.\u00a0<\/span><\/p>\n

<\/h4>\n

Active matter<\/h3>\n

Collective motion of entities is central to a variety of physical phenomena observed in various branches of physics. In particular, ideas borrowed from statistical physics have been successfully used to model fish schools, flocking of birds and patterns formed by bacterial colonies on a petri dish. Many biological species thrive in fluid environments and live in large colonies such as planktons, fish schools, and bacteria. Recent studies have shown existence of elementary form of life even in deep-sea hydrothermal vent. Even the early life on earth must have thrived in extreme environments where the fluid flow could have been turbulent. We are interested in investigating how collective behavior of animals gets affected by fluid flow (chaotic or turbulent) and how do they modify it.<\/p>\n

\"\"<\/p>\n

Figure 2<\/b> Spreading pattern of an active bacterial colony. We numerically solve Fisher equation coupled to the equations of active matter.<\/span><\/p>\n

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Multiphase flows Fluid flows are ubiquitous in nature. In most cases, the fluid consists of more than one component (e.g., dilute polymer solution, dust in air, oil-water emulsions). We conduct state-of-the-art numerical simulations to gain insight into multiphase fluid flow phenomena. The two main directions of research that are currently being pursued are: Bubbly flows […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"class_list":["post-16","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.tifrh.res.in\/~perlekar\/index.php?rest_route=\/wp\/v2\/pages\/16","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.tifrh.res.in\/~perlekar\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.tifrh.res.in\/~perlekar\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.tifrh.res.in\/~perlekar\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tifrh.res.in\/~perlekar\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=16"}],"version-history":[{"count":6,"href":"https:\/\/www.tifrh.res.in\/~perlekar\/index.php?rest_route=\/wp\/v2\/pages\/16\/revisions"}],"predecessor-version":[{"id":93,"href":"https:\/\/www.tifrh.res.in\/~perlekar\/index.php?rest_route=\/wp\/v2\/pages\/16\/revisions\/93"}],"wp:attachment":[{"href":"https:\/\/www.tifrh.res.in\/~perlekar\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=16"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}