scholarly journals Drying of channels by evaporation through a permeable medium

2019 ◽  
Vol 16 (151) ◽  
pp. 20180690 ◽  
Author(s):  
Benjamin Dollet ◽  
Jean-François Louf ◽  
Mathieu Alonzo ◽  
Kaare H. Jensen ◽  
Philippe Marmottant
Keyword(s):  
Analytical Model ◽  
Excellent Agreement ◽  
Water Diffusion ◽  
Geometrical Parameters ◽  
Pdms Layer ◽  
Plant Leaves ◽  
Drying Process ◽  
Rock Disintegration ◽  
Permeable Polymer

We study the drying of isolated channels initially filled with water moulded in a water-permeable polymer (polydimethylsiloxane, PDMS) by pervaporation, when placed in a dry atmosphere. Channel drying is monitored by tracking a meniscus, separating water from air, advancing within the channels. The role of two geometrical parameters, the channel width and the PDMS thickness, is investigated experimentally. All data show that drying displays a truncated exponential dynamics. A fully predictive analytical model, in excellent agreement with the data, is proposed to explain such a dynamics, by solving water diffusion both in the PDMS layer and in the gas inside the channel. This drying process is crucial in geological or biological systems, such as rock disintegration or the drying of plant leaves after cavitation and embolism formation.

Convective Losses From Cavity Solar Receivers—Comparisons Between Analytical Predictions and Experimental Results

1983 ◽  
Vol 105 (1) ◽  
pp. 29-33 ◽  
Author(s):  
A. M. Clausing
Keyword(s):  
Experimental Data ◽  
Experimental Evidence ◽  
Analytical Model ◽  
Excellent Agreement ◽  
Experimental Results ◽  
Simple Analytical Model ◽  
Refined Model ◽  
Wall Area

Cavity solar receivers are generally believed to have higher thermal efficiencies than external receivers due to reduced losses. A simple analytical model was presented by the author which indicated that the ability to heat the air inside the cavity often controls the convective loss from cavity receivers. Thus, if the receiver contains a large amount of inactive hot wall area, it can experience a large convective loss. Excellent experimental data from a variety of cavity configurations and orientations have recently become available. These data provided a means of testing and refining the analytical model. In this manuscript, a brief description of the refined model is presented. Emphasis is placed on using available experimental evidence to substantiate the hypothesized mechanisms and assumptions. Detailed comparisons are given between analytical predictions and experimental results. Excellent agreement is obtained, and the important mechanisms are more clearly delineated.

Gate-on-Source TFET Analytical Model: Role of Mobile Charges and Depletion Regions

2021 ◽  
Author(s):  
Mahmoud Eliwy ◽  
Muhammad Elgamal ◽  
Marwa Salem ◽  
Mostafa Fedawy ◽  
Ahmed Shaker
Keyword(s):  
Analytical Model ◽  
Mobile Charges

The feasibility of segmentation of protolanguage

2011 ◽  
Vol 12 (1) ◽  
pp. 1-35
Author(s):  
István Zachar
Keyword(s):  
Analytical Model ◽  
Analytical Method ◽  
Language Evolution ◽  
The Other ◽  
Cognitive Capacities ◽  
Other Hand ◽  
Fractionation Analysis ◽  
Definition Of ◽  
Linguistic Process

An important question in language evolution is whether segmentation as a linguistic process is able to yield compositionality. Segmentation is hypothesized to be a process to bridge the gap between holistic and compositional lexicons. However, to date no thorough analytical method has been provided to test the feasibility of segmentation. In this paper, an analytical model is presented that can predict the probability of encountering various kinds of overlaps by observing utterance pairs, and the probability of finding confirmation in the language for newly extracted segments. Language users start by using a previously evolved holistic lexicon to communicate about simple environments. They segment these holistic utterances to smaller pieces, which can be used as elements of a compositional lexicon. The model reveals that the feasibility of segmentation depends on the definition of counterexamples, i.e. those associations (pairs), which either cause ambiguous extraction of segments, or do not allow segmentation at all. On one hand if inexact overlaps are considered to be contradictory (i.e. causing confusion) to a perfect exact overlap, then the probability is so minuscule that it renders the role of segmentation marginal during language evolution. On the other hand, if such inexact counterexamples are able to be segmented unambiguously due to extra cognitive capacities, segmentation may have a much higher feasibility. Keywords: segmentation; fractionation; analysis; holistic; protolanguage; compositionality

A New Analytical Model for Assessing the Role of Steam Production in Mature Steam Floods

1995 ◽  
Author(s):  
K.D. Kimber ◽  
A.R. Deemer ◽  
T.H. Luce ◽  
H.N. Sharpe
Keyword(s):  
Analytical Model ◽  
Steam Production

Harmonious Interactions

2018 ◽  
Author(s):  
Frank Lehman
Keyword(s):  
Analytical Model ◽  
Film Music

This chapter draws together theoretical and methodological threads from the rest of the book while proposing a broader analytical model, in which various tonal styles—not only pantriadicism—interact. This model is based on a conception of triadic tonality space in which three paradigmatic axes (diatonicity, centricity, and functionality) create numerous distinct and modifiable tonal styles. These distinct styles are shown to harbor persistent associations in mainstream film music. It is argued that wondrous harmony often involves motion through triadic tonality space. A cinematically well-established example of this is the chromatically modulating cadence (CMC); the role of cadences in general for organizing film time is emphasized. The dialectic between tonal idioms has been mined for its connotative power by composers wishing to portray the various wondrous affects, and a variety of examples drawn from films that dramatize the “beatific sublime” are investigated, concluding with Alfred Newman’s The Song of Bernadette.

scholarly journals The Role of Volume Diffusion in the Metamorphism of Snow

1967 ◽  
Vol 6 (48) ◽  
pp. 879-891 ◽  
Author(s):  
P. V. Hobbs ◽  
L. F. Radke
Keyword(s):  
Particle Size ◽  
Excellent Agreement ◽  
Volume Diffusion ◽  
Theoretical Expression ◽  
Uniform Temperature ◽  
Rate Of Increase ◽  
High Concentrations

A theoretical expression is derived for the rate of increase in the density of a compact of uniform ice spheres due to volume diffusion in the ice. The diffusion occurs due to the existence of high concentrations of vacancies in the ice just beneath the concave surfaces of the necks which grow between the ice spheres. Accurate measurements on the densification of a compact of ice spheres as a function of time, temperature, and particle size are found to be in excellent agreement with the theory The importance of this process in the metamorphism of dry snow at a uniform temperature is discussed.

Design of Steam-Heated Drying Line

2014 ◽  
Vol 998-999 ◽  
pp. 405-408
Author(s):  
Li Hua Wang ◽  
Xiao Qiang Wu
Keyword(s):  
Drainage System ◽  
Heating System ◽  
Drying Process ◽  
Steam Heating ◽  
Efficient Performance ◽  
System Composition ◽  
Working Principle

This paper describes the working principle of the steam in the drying process,the structure of the steam heating system and the drainage system composition. Meantime the function and role of each component are described and studied how to build an efficient performance of the steam heating drying line.

The role of water diffusion in the action of vasopressin

1970 ◽  
Vol 2 (1) ◽  
pp. 263-276 ◽  
Author(s):  
Richard M. Hays ◽  
Nicholas Franki
Keyword(s):  
Water Diffusion
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