Porosity models

This paper presents the time history response of a sandwich beam with a porous core subjected to two moving harmonic loads with opposite directions. In the modelling, the beam is combined of two isotropic face sheets and a porous core with symmetric porosity distribution. The quasi-3D shear deformation beam theory in conjunction with Hamilton’s variational principle is utilized to set up the governing equations of motion. The Navier solution is used to obtain the displacement field.

14p dianmotminh02 03-05-2024 6 2   Download

Ebook "Porosity: Establishing the relationship between drying parameters and dried food quality" provides a comprehensive overview of porosity's effects on dried food quality. The factors influencing porosity during the various drying methods are explored in depth, as well as porosity's overall effect on food properties. The chemical reaction and stability of porosity are also covered, including sensory and mechanical properties. The work looks closely at the relationship between drying conditions, pore characteristics, and dried food quality.

81p tracanhphuonghoa1007 22-04-2024 2 2   Download

DPF is an important device in the exhaust system of Diesel engine. In this paper we simulate velocity and pressure distributions in DPF to determine kinematic and hydraulic characteristics. This will provide the basis for designing and selecting size of channels in DPF. Numerical simulations were made using ANSYS Fluent commercial software and OpenFOAM open-source software.

11p vimarillynhewson 02-01-2024 2 1   Download

This report presents an analytical approach to the natural frequency analysis of a porous beam consisting of a host porous layer reinforced with graphene platelets (GPLs), namely GPL-reinforced porous core, and two piezoelectric outer layers. In the modelling, symmetric distributions of both porosity and GPLs in the core are supposed.

13p viisac 15-09-2023 7 3   Download

Metaleorganic frameworks (MOFs) with tunable structures, high porosity, and abundant active sites are considered to be promising drug delivery systems (DDSs). In this study, novel MOFs-based nanoparticles (CUR@IRMOF-16) were successfully prepared using Zn-based IRMOF-16 as a carrier and curcumin (CUR) as the model drug.

13p viberbers 09-08-2023 4 1   Download

This report presents an analytical approach to the natural frequency analysis of a porous beam consisting of a host porous layer reinforced with graphene platelets (GPLs), namely GPL-reinforced porous core, and two piezoelectric outer layers. In the modelling, symmetric distributions of both porosity and GPLs in the core are supposed. The effective mechanical properties of the GPL-reinforced porous core are estimated by Halpin–Tsai model and the rule of mixture.

13p viwolverine 11-07-2023 3 2   Download

The application of brushwood fences along the Mekong deltaic coast has recently played a significant role in wave damping and promoting sedimentation. The results show a good agreement of wave heights and wave spectrum between the physical, vegetation and porosity models. Furthermore, the computational and physical model errors, such as BIAS and SI values, are less than 1 mm and 10%, respectively.

10p viironman 02-06-2023 7 3   Download

In this study, we develop a model for permeability for porous media using an upscaling technique. For this, we conceptualize a porous medium as a bundle of capillary tubes with the similarly skewed pore size distribution. The proposed model is related to microstructural properties such as maximum radius, porosity, tortuosity and a characteristic constant of porous media.

7p vimalfoy 08-02-2023 3 2   Download

A correlative maturity study integrated with seismic attributes for determining the shale gas potential of Ghazij Formation is carried out. Analysis of post-stack seismic attributes has been frequently used to identify areas of high exploration potential within shale resource plays. Seismic and well data have been utilized for the analysis of maturity trends in the shale facies of Ghazij Formation.

19p tanmocphong 29-01-2022 38 2   Download

The developed and implemented DEM-based strategy is applied to analyze stiffness and strength of inverse opals made of pure silica and inverse opals coated with titania layers of various thicknesses. Also, the influence of the porosity of the initial packing on the properties of the material is investigated.

14p guernsey 28-12-2021 4 0   Download

The observations for the binder-jetted material therefore stand in stark contrast to those for SLM-made stainless steel which can provide an even higher yield strength than the wrought material. From a mechanism point of view, the low mechanical properties of the binder-jetted material may be explained by the high initial porosity which is reminiscent of cast metals.

15p guernsey 28-12-2021 19 0   Download

In this paper, effect of porosity on nonlinear analysis of plate structures is presented. Two porous distributions are considered. Governing equations are expressed by using isogeometric analysis (IGA) and the third-order shear deformation theory (TSDT). With these approaches, it is easy to fulfil the C1-continuity requirement of the plate model.

3p viwilliamleiding 10-12-2021 8 1   Download

Infiltration is a dynamic process, variable in time and space and plays a vital role in the replenishment of soil water which is responsible for the growth and development of crops. Modelling of infiltration equation involves in finding out coefficients in the expressions for the curves infiltration rate and accumulated infiltration verses time and other parameters. The present study is aimed at determining the best fit infiltration model.

11p angicungduoc5 12-06-2020 6 1   Download

On this base, the mechanistic MFPR code, including physically-grounded models for the fuel porosity evolution in UO2 fuel under various irradiation and thermal regimes, is refined. These modifications complete the consistent description of the fuel porosity evolution in the MFPR code and result in a notable improvement of the code predictions.

7p christabelhuynh 30-05-2020 9 1   Download

The study was conducted to investigate some physical properties of soybean at various moisture levels. The dependence of physical properties of soybean on moisture content was determined. In the moisture range from 9.98- 27.10% (wb).The soaked soybean size increased linearly in length (6.34 - 8.95 mm), width (5.42 -6.50 mm), and thickness (4.23 - 5.35 mm) according to final moisture content. In this study, length, width and thickness models based on moisture content are defined as linear models and the regression coefficients (R2 ) related to these models are found between 0.84, 0.72 and 0.

13p quenchua2 15-12-2019 12 0   Download

The purpose of reservoir characterisation is to fi gure out the spatial distribution of petrophysical properties such as porosity, permeability and water saturation that are key parameters for construction of the geological model. Characterisation of a carbonate reservoir is often diffi cult mainly due to the complexity of its pore system. This study presents an integrated approach to using well log and micro-geological data to characterise rock fabrics and their pore system for a carbonate reservoir in the HR structure.

8p quenchua 27-09-2019 34 0   Download

Journal with the situation of Vietnam Oil and Gas industry, domestic and international cooperation of the petroleum industry in June year 2014. With the following articles: Synthesis of crude oil pour point depressants via poly condensation of cashew nut shell liquids; building porosity model of fractured basement reservoir based on integrated seismic an well data in Hai Su Den field, Cuu Long basin; first oil from Thang Long field...

80p luu1212 18-07-2019 28 0   Download

This thesis aims to develop finite element models for studying vibration of FGM porous beams in thermal environment under moving loads. Both analytical method and finite element analysis are employed in the thesis. The analytical method is used to derive equations of motion for the beam, and the finite element method is then employed to solve the governing equations and to determine the dynamic characteristics of the beams.

28p xacxuoc4321 09-07-2019 34 6   Download

In this model, the fission gas atoms are treated as the special precipitates in the irradiated UO2 fuel matrix. The calculated results indicate that the significant pore coarsening and mean pore density decrease in the HBS occur upon surpassing a local burn-up of 100 GWd/tM. The capability of this model is successfully validated against irradiation experiments of UO2 fuel, in which the average pore radius, pore density, and porosity are directly measured as functions of local burn-up.

7p minhxaminhyeu5 30-06-2019 8 0   Download

This study corrected and supplemented the broken segments, then use the corrected and supplemented curves to calculate porosity. The porosity calculated in this study for 9 wells has been used by JVPC to build the mining production technology diagrams, whle the existing softwares can not calculate this parameter. The testing result proves that the Artificial Neural Network model (ANN) of this study is great tool for correction and supplementing of the well log curves.

10p nguyenvanhoangvnu 12-06-2017 35 1   Download