Thermochromic visualization of the heated region around a microbubble during Marangoni flow generation

2021 ◽  
Vol 15 (01) ◽  
Author(s):  
Kyoko Namura ◽  
Toshiki Sono ◽  
Samir Kumar ◽  
Kaoru Nakajima ◽  
Motofumi Suzuki
2021 ◽  
Vol 922 ◽  
Author(s):  
Islam Benouaguef ◽  
Naga Musunuri ◽  
Edison C. Amah ◽  
Denis Blackmore ◽  
Ian S. Fischer ◽  
...  
Keyword(s):  

Abstract


2021 ◽  
Vol 12 (4) ◽  
pp. 489-493
Author(s):  
Grace P. Ahlqvist ◽  
Eileen G. Burke ◽  
Jeremiah A. Johnson ◽  
Timothy F. Jamison

Herein we describe the development of a reactor for the continuous flow generation and use of dimethyldioxirane (DMDO) and its application to the low-level epoxidation of unsaturated polymers.


2021 ◽  
Vol 33 (2) ◽  
Author(s):  
Paolo Capobianchi ◽  
Marcello Lappa

AbstractSystems of solid particles in suspension driven by a time-periodic flow tend to create structures in the carrier fluid that are reminiscent of highly regular geometrical items. Within such a line of inquiry, the present study provides numerical results in support of the space experiments JEREMI (Japanese and European Research Experiment on Marangoni flow Instabilities) planned for execution onboard the International Space Station. The problem is tackled by solving the unsteady non-linear governing equations for the same conditions that will be established in space (microgravity, 5 cSt silicone oil and different aspect ratios of the liquid bridge). The results reveal that for a fixed supporting disk radius, the dynamics are deeply influenced by the height of the liquid column. In addition to its expected link with the critical threshold for the onset of instability (which makes Marangoni flow time-periodic), this geometrical parameter can have a significant impact on the emerging waveform and therefore the topology of particle structures. While for shallow liquid bridges, pulsating flows are the preferred mode of convection, for tall floating columns the dominant outcome is represented by rotating fluid-dynamic disturbance. In the former situation, particles self-organize in circular sectors bounded internally by regions of particle depletion, whereas in the latter case, particles are forced to accumulate in a spiral-like structure. The properties of some of these particle attractors have rarely been observed in earlier studies concerned with fluids characterized by smaller values of the Prandtl number.


2021 ◽  
Vol 33 (6) ◽  
pp. 062103
Author(s):  
Meisam Pourali ◽  
Martin Kröger ◽  
Jan Vermant ◽  
Patrick D. Anderson ◽  
Nick O. Jaensson

2018 ◽  
Vol 3 (2) ◽  
Author(s):  
Kai Sun ◽  
Peng Zhang ◽  
Zhizhao Che ◽  
Tianyou Wang

2018 ◽  
Vol 3 (2) ◽  
Author(s):  
Rodrigo Leite Pinto ◽  
Sébastien Le Roux ◽  
Isabelle Cantat ◽  
Arnaud Saint-Jalmes

Sign in / Sign up

Export Citation Format

Share Document