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Flames, Splashes and Microdroplets: ...

Chemama, Michael Leopold.

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Flames, Splashes and Microdroplets: A Mathematical Approach to three Fluid Dynamics Problems.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Flames, Splashes and Microdroplets: A Mathematical Approach to three Fluid Dynamics Problems./
作者:	Chemama, Michael Leopold.
面頁冊數:	62 p.
附註:	Source: Dissertation Abstracts International, Volume: 76-09(E), Section: B.
Contained By:	Dissertation Abstracts International76-09B(E).
標題:	Plasma physics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3700470
ISBN:	9781321704495

Flames, Splashes and Microdroplets: A Mathematical Approach to three Fluid Dynamics Problems.
Chemama, Michael Leopold.

Flames, Splashes and Microdroplets: A Mathematical Approach to three Fluid Dynamics Problems. - 62 p.

Source: Dissertation Abstracts International, Volume: 76-09(E), Section: B.

Thesis (Ph.D.)--Harvard University, 2015.

Three different problems in fluid mechanics are presented in this thesis. The first one deals with the mechanism behind the extinction of a flame by an alternating electric field. A simple model for the interaction between the field and the ions produced by the reaction is presented, which agrees quantitatively with the experiments. It also indicates that charges diffusion is responsible for the non-zero time averaged force on the flame. The second problem focuses on the role of viscosity during the splash of liquid droplets. We show that contrary to what was done in previous theoretical studies, the role of viscosity cannot be investigated within the framework of a boundary layer approximation. Rather, the full viscous term must be included in the equations. Finally, we present the theory behind a new microfluidic device (called centipede) which produces microdroplets at a very high rate without relying on any active element to precipitate the detachment of the drops. We clearly show that the drops detach through a Rayleigh-Plateau instability in an otherwise quasi-static flow. We also predict how the throughput and size of the drops are affected by the geometrical parameters of the device.

ISBN: 9781321704495Subjects--Topical Terms:

3175417
Plasma physics.

Flames, Splashes and Microdroplets: A Mathematical Approach to three Fluid Dynamics Problems.
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500 $a Adviser: Michael P. Brenner.
502 $a Thesis (Ph.D.)--Harvard University, 2015.
520 $a Three different problems in fluid mechanics are presented in this thesis. The first one deals with the mechanism behind the extinction of a flame by an alternating electric field. A simple model for the interaction between the field and the ions produced by the reaction is presented, which agrees quantitatively with the experiments. It also indicates that charges diffusion is responsible for the non-zero time averaged force on the flame. The second problem focuses on the role of viscosity during the splash of liquid droplets. We show that contrary to what was done in previous theoretical studies, the role of viscosity cannot be investigated within the framework of a boundary layer approximation. Rather, the full viscous term must be included in the equations. Finally, we present the theory behind a new microfluidic device (called centipede) which produces microdroplets at a very high rate without relying on any active element to precipitate the detachment of the drops. We clearly show that the drops detach through a Rayleigh-Plateau instability in an otherwise quasi-static flow. We also predict how the throughput and size of the drops are affected by the geometrical parameters of the device.
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650 4 $a Plasma physics. $3 3175417
650 4 $a Mathematics. $3 515831
650 4 $a Mechanical engineering. $3 649730
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