語系:
繁體中文
English
說明(常見問題)
回圖書館首頁
手機版館藏查詢
登入
回首頁
切換:
標籤
|
MARC模式
|
ISBD
FindBook
Google Book
Amazon
博客來
Capillarity: Draining and Surface Vibrations.
紀錄類型:
書目-電子資源 : Monograph/item
正題名/作者:
Capillarity: Draining and Surface Vibrations./
作者:
McCraney, Joshua.
出版者:
Ann Arbor : ProQuest Dissertations & Theses, : 2021,
面頁冊數:
104 p.
附註:
Source: Dissertations Abstracts International, Volume: 83-04, Section: B.
Contained By:
Dissertations Abstracts International83-04B.
標題:
Aerospace engineering. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28645520
ISBN:
9798460415236
Capillarity: Draining and Surface Vibrations.
McCraney, Joshua.
Capillarity: Draining and Surface Vibrations.
- Ann Arbor : ProQuest Dissertations & Theses, 2021 - 104 p.
Source: Dissertations Abstracts International, Volume: 83-04, Section: B.
Thesis (Ph.D.)--Cornell University, 2021.
This item must not be sold to any third party vendors.
This thesis is comprised of two overarching pieces of work: chapters 1 and 2 analyze and simulate experimental capillary draining flight data flown aboard the International Space Station. Chapter 3 considers a spectral approach to recover the fundamental oscillatory and damping frequencies for a liquid in a rectangular channel. Each chapter formulates its own published paper; as such, each chapter comprises of an introduction and conclusion. The following introduces the general phenomenon of capillary fluidics in microgravity, following by brief summaries of the two bodies of work.On earth, a hole in the bottom of a liquid-filled bucket is a convenient way to drain it. However, in the nearly weightless environment of orbiting or coast spacecraft, there is no 'bottom' because there is effectively no gravity, and the liquid simply remains in the bucket. In fact, for many liquid handling operations aboard spacecraft, the phenomena are dominated by passive capillary forces over large length scales to which we are not accustomed. However, it is no less necessary to drain 'buckets' aboard spacecraft; i.e., fuels, propellants, coolants, water. In terrestrial systems the effects of capillary forces have long been observed and exploited for sub-millimetric/micro-liter scale fluids processes where capillary forces are similarly dominant. Especially in situations where the liquid involved is precious, it is important to process it in a manner that wastes nothing; i.e., one that achieves maximum drain rates with minimum liquid hold-up as a function of initial conditions, container geometry, and fluid properties.Chapters 1 and 2: In the reduced acceleration environment aboard orbiting spacecraft, capillary forces are often exploited to access and control the location and stability of fuels, propellants, coolants, and biological liquids in containers (tanks) for life support. To access the `far reaches' of such tanks, the passive capillary pumping mechanism of interior corner networks can be employed to achieve high levels of draining. With knowledge of maximal corner drain rates, gas ingestion can be avoided and accurate drain transients predicted. In this work, we benchmark a numerical method for the symmetric draining of capillary liquids in simple interior corners. The free surface is modeled through a volume of fluid (VOF) algorithm via interFoam, a native OpenFOAM solver. The simulations are compared with rare space experiments conducted on the International Space Station. The results are also buttressed by simplified analytical predictions where practicable. The fact that the numerical model does well in all cases is encouraging for further spacecraft tank draining applications of significantly increased geometric complexity and fluid inertia.Chapter 3: A capillary surface bound by a solid rectangular channel exhibits dynamic wetting effects characterized by a constitutive law relating the dynamic contact-angle to the contact-line speed through the contact-line mobility Λ parameter. Limiting cases correspond to the free (Λ=0) and pinned (Λ=∞) contact-line. Viscous potential flow is used to derive the governing integrodifferential equation from a boundary integral approach. The spectrum is determined from a boundary value problem where the eigenvalue parameter appears in the boundary condition. Here we introduce a new computationally-efficient and tractable frequency scan approach to compute the spectrum, whereby we scan the complex frequency plane and compute the system response from which we identify the complex resonance frequency. Damping effects due to viscosity and Davis dissipation from finite Λ do not attenuate signal response, but rather shift the response poles into the complex plane. Our new approach is verified against an analytical solution in the appropriate limit. We identify the critical mobility that maximizes Davis dissipation and the critical Ohnesorge number (viscosity) where the transition from underdamped to overdamped oscillations occur, as it depends upon the static contact-angle α. Our approach is applied to a rectangular channel, but is suitable for a myriad of geometric supports.
ISBN: 9798460415236Subjects--Topical Terms:
1002622
Aerospace engineering.
Subjects--Index Terms:
Capillary fluidics
Capillarity: Draining and Surface Vibrations.
LDR
:05281nmm a2200361 4500
001
2343258
005
20220502104212.5
008
241004s2021 ||||||||||||||||| ||eng d
020
$a
9798460415236
035
$a
(MiAaPQ)AAI28645520
035
$a
AAI28645520
040
$a
MiAaPQ
$c
MiAaPQ
100
1
$a
McCraney, Joshua.
$0
(orcid)0000-0001-5593-479X
$3
3681770
245
1 0
$a
Capillarity: Draining and Surface Vibrations.
260
1
$a
Ann Arbor :
$b
ProQuest Dissertations & Theses,
$c
2021
300
$a
104 p.
500
$a
Source: Dissertations Abstracts International, Volume: 83-04, Section: B.
500
$a
Advisor: Desjardins, Olivier.
502
$a
Thesis (Ph.D.)--Cornell University, 2021.
506
$a
This item must not be sold to any third party vendors.
520
$a
This thesis is comprised of two overarching pieces of work: chapters 1 and 2 analyze and simulate experimental capillary draining flight data flown aboard the International Space Station. Chapter 3 considers a spectral approach to recover the fundamental oscillatory and damping frequencies for a liquid in a rectangular channel. Each chapter formulates its own published paper; as such, each chapter comprises of an introduction and conclusion. The following introduces the general phenomenon of capillary fluidics in microgravity, following by brief summaries of the two bodies of work.On earth, a hole in the bottom of a liquid-filled bucket is a convenient way to drain it. However, in the nearly weightless environment of orbiting or coast spacecraft, there is no 'bottom' because there is effectively no gravity, and the liquid simply remains in the bucket. In fact, for many liquid handling operations aboard spacecraft, the phenomena are dominated by passive capillary forces over large length scales to which we are not accustomed. However, it is no less necessary to drain 'buckets' aboard spacecraft; i.e., fuels, propellants, coolants, water. In terrestrial systems the effects of capillary forces have long been observed and exploited for sub-millimetric/micro-liter scale fluids processes where capillary forces are similarly dominant. Especially in situations where the liquid involved is precious, it is important to process it in a manner that wastes nothing; i.e., one that achieves maximum drain rates with minimum liquid hold-up as a function of initial conditions, container geometry, and fluid properties.Chapters 1 and 2: In the reduced acceleration environment aboard orbiting spacecraft, capillary forces are often exploited to access and control the location and stability of fuels, propellants, coolants, and biological liquids in containers (tanks) for life support. To access the `far reaches' of such tanks, the passive capillary pumping mechanism of interior corner networks can be employed to achieve high levels of draining. With knowledge of maximal corner drain rates, gas ingestion can be avoided and accurate drain transients predicted. In this work, we benchmark a numerical method for the symmetric draining of capillary liquids in simple interior corners. The free surface is modeled through a volume of fluid (VOF) algorithm via interFoam, a native OpenFOAM solver. The simulations are compared with rare space experiments conducted on the International Space Station. The results are also buttressed by simplified analytical predictions where practicable. The fact that the numerical model does well in all cases is encouraging for further spacecraft tank draining applications of significantly increased geometric complexity and fluid inertia.Chapter 3: A capillary surface bound by a solid rectangular channel exhibits dynamic wetting effects characterized by a constitutive law relating the dynamic contact-angle to the contact-line speed through the contact-line mobility Λ parameter. Limiting cases correspond to the free (Λ=0) and pinned (Λ=∞) contact-line. Viscous potential flow is used to derive the governing integrodifferential equation from a boundary integral approach. The spectrum is determined from a boundary value problem where the eigenvalue parameter appears in the boundary condition. Here we introduce a new computationally-efficient and tractable frequency scan approach to compute the spectrum, whereby we scan the complex frequency plane and compute the system response from which we identify the complex resonance frequency. Damping effects due to viscosity and Davis dissipation from finite Λ do not attenuate signal response, but rather shift the response poles into the complex plane. Our new approach is verified against an analytical solution in the appropriate limit. We identify the critical mobility that maximizes Davis dissipation and the critical Ohnesorge number (viscosity) where the transition from underdamped to overdamped oscillations occur, as it depends upon the static contact-angle α. Our approach is applied to a rectangular channel, but is suitable for a myriad of geometric supports.
590
$a
School code: 0058.
650
4
$a
Aerospace engineering.
$3
1002622
650
4
$a
Mechanical engineering.
$3
649730
650
4
$a
Applied mathematics.
$3
2122814
653
$a
Capillary fluidics
653
$a
Interface
653
$a
Acceleration environment
653
$a
Fluid inertia
690
$a
0538
690
$a
0548
690
$a
0364
710
2
$a
Cornell University.
$b
Aerospace Engineering.
$3
3437885
773
0
$t
Dissertations Abstracts International
$g
83-04B.
790
$a
0058
791
$a
Ph.D.
792
$a
2021
793
$a
English
856
4 0
$u
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28645520
筆 0 讀者評論
館藏地:
全部
電子資源
出版年:
卷號:
館藏
1 筆 • 頁數 1 •
1
條碼號
典藏地名稱
館藏流通類別
資料類型
索書號
使用類型
借閱狀態
預約狀態
備註欄
附件
W9465696
電子資源
11.線上閱覽_V
電子書
EB
一般使用(Normal)
在架
0
1 筆 • 頁數 1 •
1
多媒體
評論
新增評論
分享你的心得
Export
取書館
處理中
...
變更密碼
登入