Liquid Container Filling and Charging

1976 ◽  
Vol 98 (2) ◽  
pp. 730-732
Author(s):  
R. H. Nunn ◽  
E. J. Gibson
Keyword(s):  
Closed Form ◽  
Dynamic Behavior ◽  
Analytical Model ◽  
Experimental Results ◽  
Simple Analytical Model ◽  
Liquid Slug ◽  
Analytical Formulation ◽  
Closed Form Solutions

A simple analytical model has been developed to describe the dynamic behavior of a liquid slug as it is rapidly and suddenly rammed into a receiving chamber. Useful closed-form solutions are obtained from approximate versions of the governing relationships. Experimental results indicate the essential correctness of the analytical formulation.

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.

On Wave Propagation in Thermoplastic Media

1966 ◽  
Vol 33 (3) ◽  
pp. 514-520 ◽  
Author(s):  
A. D. Fine ◽  
H. Kraus
Keyword(s):  
Wave Propagation ◽  
Closed Form ◽  
Wave Front ◽  
Dynamic Behavior ◽  
Static Analysis ◽  
Equations Of Motion ◽  
Normal Velocity ◽  
Wave Fronts ◽  
Closed Form Solutions ◽  
Infinite Region

The dynamic behavior of a medium, according to the uncoupled thermoplastic theory, is presented and is compared to the behavior that would be obtained from an uncoupled quasi-static analysis. Since the inertia terms are retained in the equations of motion, wave fronts (or surfaces of discontinuity) are produced in the medium. The normal velocity of the wave front separating the elastic and plastic regions is determined. General closed-form solutions of the displacement (according to both the dynamic and the quasi-static approaches) are obtained; their unique forms are found for the semi-infinite region, and an illustrative numerical example is then presented.

Power Allocation-Aided Enhanced SM-OFDM: Closed-form Solutions and Experimental Results

2021 ◽  
pp. 1-1
Author(s):  
Ke Jiang ◽  
Ping Yang ◽  
Yue Xiao ◽  
Zilong Liu ◽  
Yong LIANG Guan ◽  
...  
Keyword(s):  
Closed Form ◽  
Power Allocation ◽  
Experimental Results ◽  
Closed Form Solutions

Faraday instability threshold in large-aspect-ratio containers

2002 ◽  
Vol 467 ◽  
pp. 307-330 ◽  
Author(s):  
FRANCISCO J. MANCEBO ◽  
JOSÉ M. VEGA
Keyword(s):  
Aspect Ratio ◽  
Numerical Solution ◽  
Closed Form ◽  
Ad Hoc ◽  
Linear Problem ◽  
Experimental Results ◽  
Large Aspect Ratio ◽  
Faraday Waves ◽  
Closed Form Solutions ◽  
Faraday Instability

We consider the Floquet linear problem giving the threshold acceleration for the appearance of Faraday waves in large-aspect-ratio containers, without further restrictions on the values of the parameters. We classify all distinguished limits for varying values of the various parameters and simplify the exact problem in each limit. The resulting simplified problems either admit closed-form solutions or are solved numerically by the well-known method introduced by Kumar & Tuckerman (1994). Some comparisons are made with (a) the numerical solution of the original exact problem, (b) some ad hoc approximations in the literature, and (c) some experimental results.

A Simple Analytical Model to Simulate Oblique Ballistic Impact onto Fabric

2011 ◽  
Vol 110-116 ◽  
pp. 3453-3458
Author(s):  
Mohamad Ali Akbari ◽  
Golam Hosein Liaghat ◽  
Hadi Sabouri
Keyword(s):  
Experimental Data ◽  
Analytical Model ◽  
Ballistic Impact ◽  
Experimental Results ◽  
Simple Analytical Model ◽  
Good Agreement

A simple analytical model for oblique ballistic impact of projectiles into fabrics are presented. This model is extension of Chocron-Benloulo penetration model. Results are compared with experimental data. There is good agreement between analytical and experimental results.

Rigid-Body Water–Surface Impact Dynamics: Experiment and Semianalytical Approximation

2013 ◽  
Vol 136 (1) ◽  
Author(s):  
Ravi Challa ◽  
Solomon C. Yim ◽  
V. G. Idichandy ◽  
C. P. Vendhan
Keyword(s):  
Rigid Body ◽  
Closed Form ◽  
Experimental Results ◽  
Scale Model ◽  
Water Impact ◽  
Equivalent Radius ◽  
Closed Form Solutions ◽  
Von Karman ◽  
Von Kármán ◽  
The Impact

An experimental study of the dynamics of a generic rigid body during water impact and an equivalent-radius approximate analytical procedure is developed and calibrated in this study. The experimental tests in a wave basin covered a range of drop heights using a 1/6th-scale model of a practical water-landing object prototype for two drop mechanisms to determine the water impact and contact effects. The first mechanism involved a rope and pulley arrangement, while the second mechanism employed an electromagnetic release to drop the rigid body. Hydrodynamic parameters including peak acceleration and touchdown pressure were measured and the maximum impact/contact force was estimated for various entry speeds (corresponding to various drop heights) and weights of the rigid body. Results from the tests show that the impact acceleration and touchdown pressure increases approximately linearly with increasing drop height and the data provides conditions that keep impact accelerations under specified limits for the rigid-body prototype. The experimentally measured maximum accelerations were compared with classical von Karman and Wagner approximate closed-form solutions. In this study, an improved approximate solution procedure using an equivalent radius concept integrating experimental results with the von Karman and Wagner closed-form solutions is proposed and developed in detail. The resulting semianalytical estimates are calibrated against experimental results and found to provide close matching.

A Simple Analytical Model to Simulate Textile Fabric Ballistic Impact Behavior

1997 ◽  
Vol 67 (7) ◽  
pp. 520-528 ◽  
Author(s):  
Isaias Sidney Chocron-Benloulo ◽  
J. Rodríguez ◽  
Vicente Sánchez-Gálvez
Keyword(s):  
Composite Materials ◽  
Analytical Model ◽  
High Performance ◽  
Predictive Power ◽  
Ballistic Impact ◽  
Experimental Results ◽  
Impact Behavior ◽  
Light Weight ◽  
Simple Analytical Model ◽  
Textile Fabric

Composite materials have become very attractive as personal and vehicle armors because of their light weight and high performance. Unfortunately, these materials are difficult to simulate numerically or analytically, and the only way to check their performance is experimentally. A first step could be the study of the primary components of the composite. The fabric is undoubtedly the most important one, and an analytical model of its behavior is developed in this paper. The model calculates residual velocities, velocity and strain in the fabric histories, and absorbed energies. The comparison with experimental results for Kevlar 29 and the application of the model to Dyneema are very satisfactory as a demonstration of the good predictive power of an analytical model that is easy to understand and easy to compute.

Bond-Slip Relationship for EB-FRP Joints by Including Free End Slip

2013 ◽  
Vol 368-370 ◽  
pp. 1031-1038
Author(s):  
Kang Liu
Keyword(s):  
Closed Form ◽  
Response Curve ◽  
Experimental Results ◽  
Identification Procedure ◽  
Bond Slip ◽  
Closed Form Solutions ◽  
Theoretical Results ◽  
Good Agreement

Closed form solutions are derived in this work by including free end slip, relating free end and loaded end slips to bond resistance, as well as relating slip or strain at any position to free end slip. To identify the bond-slip relationship, indirect analytical identification from load-slip response curve is used. Using the identification procedure developed in this paper, very good agreement between the theoretical solutions and experimental results was observed, which validates the theoretical results derived in this work.

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