scholarly journals Determination of hydraulic conductivity for granular filters based on constriction size and shape parameters

2021 ◽  
Author(s):  
Nasir Ahmad Rather ◽  
Mohd Akbar Lone ◽  
Abdul Qayoom Dar ◽  
Mir Bintul Huda
Keyword(s):  
Experimental Study ◽  
Hydraulic Conductivity ◽  
Empirical Model ◽  
Filter Material ◽  
Experimental Results ◽  
Experimental Investigations ◽  
Shape Parameters ◽  
Granular Filter ◽  
Granular Filters

Abstract This experimental study is an attempt to apply the constriction size concept for determination of hydraulic conductivity of filter material. Five shapes of granular filter material having varying gradations were used for the experimental investigations. The controlling constriction size of selected shapes having varying gradations were worked out and related to the experimental results of hydraulic conductivity. The empirical model for hydraulic conductivity determination based on controlling constriction size for each selected shape of granular filter material was developed. Finally, a combined empirical model for the determination of hydraulic conductivity of granular filters was developed based on shape parameters and the controlling constriction size.

scholarly journals Experimental study of dust deposition in dynamic granular filters

RSC Advances ◽  
2018 ◽  
Vol 8 (68) ◽  
pp. 38903-38909 ◽  
Author(s):  
Wenning Zhou ◽  
Juan Ma ◽  
Guoliang Zeng ◽  
Baiqian Liu
Keyword(s):  
Experimental Study ◽  
Theoretical Explanation ◽  
Dust Deposition ◽  
Granular Filter ◽  
Cake Formation ◽  
Granular Filters

A theoretical explanation and experimental study of dust cake formation and growth in a novel dynamic granular filter are presented.

The Experimental Study of Contaminant Removal in Water Quenched Slag Biological Aerated Filter (BAF)

2012 ◽  
Vol 602-604 ◽  
pp. 1171-1174
Author(s):  
Long Long Gao ◽  
Yan Zhen Yu ◽  
Miao Wan Li ◽  
Yu Xing Zhou ◽  
Hua Dong Zhang
Keyword(s):  
Experimental Study ◽  
Wastewater Treatment ◽  
Removal Rate ◽  
Filter Material ◽  
Experimental Results ◽  
Filter Medium ◽  
Contaminant Removal ◽  
Biological Aerated Filter ◽  
Aerated Filter ◽  
Second Use

In order to effectively resolve pollution issue of water quenched slag and its comprehensive use or second use of materials, the water quenched slag filter material is developed using water quenched slag with the addition of adhesion-increasing agent and porogen by commingle, pelletizing and curing. Experimental results indicate that water quenched slag filter material is used as filter medium in biological aerated filter for wastewater treatment,and the removal rate of COD, NH3-N comes up to 84.62%,90.20% respectively. The filter material is much more predominant and possesses a much wider application prospect in the treatment of wastewate.

The Method of Harmonic Excitation for Determination of the Flexibility of the Support of Machine’s Rotor

2002 ◽  
Author(s):  
Jozef Rybczynski
Keyword(s):  
Rotor Dynamics ◽  
Harmonic Excitation ◽  
Experimental Results ◽  
Experimental Investigations ◽  
Test Rig ◽  
Harmonic Force ◽  
Damping Coefficients ◽  
Stiffness Coefficients ◽  
Made In

A series of experimental investigations were made in order to determine the set of coefficients of flexibility of construction supporting the rotor. The investigations were made on the test rig for the rotor dynamics investigation. A harmonic force of known amplitude was applied to all supports of the system to induce vibration of the system. Then the system’s reaction in the form of displacement in all connections at the same time was measured. On the bases of the experimental results a square 36-element (6×6) matrix of flexibility coefficients for each frequency of excitation was created. The matrices are the initial material to determine the modal masses, stiffness coefficients and damping coefficients in such form so that they could be the data to calculate the dynamics of the experimental rotor by means of computer programs. Moreover the experimental results are interesting information in the to analysis of the behavior of the test rig’s pedestals.

Experimental Study on Elastic Modulus of a Steel-Plastic Composite Pipe

2011 ◽  
Vol 204-210 ◽  
pp. 1579-1583
Author(s):  
Fei Wang ◽  
Guan Long Yan ◽  
Guo Wei Wang
Keyword(s):  
Experimental Study ◽  
Elastic Modulus ◽  
Excellent Agreement ◽  
Experimental Results ◽  
Basic Data ◽  
Experimental Investigations ◽  
Plastic Composite ◽  
Composite Pipe ◽  
Pipeline Design

A pit experimental investigations on elastic modulus of the dn160 steel-plastic composite pipe are carried out in the paper. The experimental results show that the elastic modulus of steel-plastic composite pipe is 10.93 GPa. In order to verify the pit experimental, buried-heating experiments are conducted. It was found that the deviation is within 6%. The excellent agreement indicated that the elastic modulus data by pit experiment are reliable and can be used as basic data for directly buried heating pipeline design.

Experimental Investigations Into the Influences of SCRs and Appurtenances on Deepdraft Semisubmersible Vortex Induced Motion Response

2011 ◽  
Author(s):  
Oriol Rijken ◽  
Sipke Schuurmans ◽  
Steve Leverette
Keyword(s):  
Experimental Study ◽  
Model Test ◽  
Experimental Results ◽  
Experimental Investigations ◽  
Mooring System ◽  
Motion Response ◽  
Test Conditions ◽  
Induced Motion ◽  
Scr System ◽  
Design Guidance

Vortex Induced Motion (VIM) response of a deep draft semisubmersible with square columns has been observed various model test conditions and in the field. A good understanding of the VIM phenomenon is desired because VIM can lead to significant SCR fatigue, especially for the larger diameters SCRs. A VIM design guidance was developed from several previous experimental investigations. Those experimental investigations are characterized by hulls with limited detail, and a simplified mooring / SCR system where typically only the stiffness is taken into consideration. A comparative experimental study is performed to identify the differences in VIM response under the absence and presence of hull appurtenances. Further, the VIM responses of a semisubmersible restrained by a mooring system without and with an SCR system are compared. An evaluation of the experimental results leads to an improved understanding of the VIM response at model test scale.

Determination of Charge Coefficient of Piezoelectric Films Using a Combined Finite Element Model and Dynamic Loading Technique

2020 ◽  
Vol 835 ◽  
pp. 229-242
Author(s):  
Oboso P. Bernard ◽  
Nagih M. Shaalan ◽  
Mohab Hossam ◽  
Mohsen A. Hassan
Keyword(s):  
Finite Element ◽  
Dynamic Loading ◽  
Material Properties ◽  
Accurate Determination ◽  
Substrate Material ◽  
Experimental Results ◽  
Piezoelectric Composite ◽  
Piezoelectric Film ◽  
Piezoelectric Charge

Accurate determination of piezoelectric properties such as piezoelectric charge coefficients (d33) is an essential step in the design process of sensors and actuators using piezoelectric effect. In this study, a cost-effective and accurate method based on dynamic loading technique was proposed to determine the piezoelectric charge coefficient d33. Finite element analysis (FEA) model was developed in order to estimate d33 and validate the obtained values with experimental results. The experiment was conducted on a piezoelectric disc with a known d33 value. The effect of measuring boundary conditions, substrate material properties and specimen geometry on measured d33 value were conducted. The experimental results reveal that the determined d33 coefficient by this technique is accurate as it falls within the manufactures tolerance specifications of PZT-5A piezoelectric film d33. Further, obtained simulation results on fibre reinforced and particle reinforced piezoelectric composite were found to be similar to those that have been obtained using more advanced techniques. FE-results showed that the measured d33 coefficients depend on measuring boundary condition, piezoelectric film thickness, and substrate material properties. This method was proved to be suitable for determination of d33 coefficient effectively for piezoelectric samples of any arbitrary geometry without compromising on the accuracy of measured d33.

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