Pitching Angle on Space Capsule Water Landing Using Smooth Particle Hydrodynamic Method

2017 ◽  
Vol 54 (3) ◽  
pp. 743-754 ◽  
Author(s):  
Zhaoyan Lu ◽  
Tianhang Xiao ◽  
Zhengzhou Li ◽  
Zhenming Zhang ◽  
Sha Du ◽  
...  
Keyword(s):  
Smooth Particle Hydrodynamic ◽  
Smooth Particle Hydrodynamic Method ◽  
Hydrodynamic Method ◽  
Space Capsule

Study of Impact-Induced Mechanical Effects in Cell Direct Writing Using Smooth Particle Hydrodynamic Method

2008 ◽  
Vol 130 (2) ◽  
Author(s):  
Wei Wang ◽  
Yong Huang ◽  
Mica Grujicic ◽  
Douglas B. Chrisey
Keyword(s):  
Shear Strain ◽  
Mechanical Loading ◽  
Cell Damage ◽  
Smooth Particle Hydrodynamic ◽  
Strain Component ◽  
Direct Writing ◽  
Maximum Shear Strain ◽  
Smooth Particle Hydrodynamic Method ◽  
Hydrodynamic Method ◽  
The Impact

Biomaterial direct-write technologies have been receiving more and more attention as rapid prototyping innovations in the area of tissue engineering, regenerative medicine, and biosensor∕actuator fabrication based on computer-aided designs. However, cell damage due to the mechanical impact during cell direct writing has been observed and is a possible hurdle for broad applications of fragile cell direct writing. The objective of this study is to investigate the impact-induced cell mechanical loading profile in cell landing in terms of stress, acceleration, and maximum shear strain component during cell direct writing using a mesh-free smooth particle hydrodynamic method. Such cell mechanical loading profile information can be used to understand and predict possible impact-induced cell damage. It is found that the cell membrane usually undergoes a relatively severe deformation and the cell mechanical loading profile is dependent on the cell droplet initial velocity and the substrate coating thickness. Two important impact processes may occur during cell direct writing: the first impact between the cell droplet and the substrate coating and the second impact between the cell and the substrate. It is concluded that the impact-induced cell damage depends not only on the magnitudes of stress, acceleration, and∕or shear strain but also the loading history that a cell experiences.

Modeling and Analysis of the Droplet Landing Process in Cell Direct-Writing

2013 ◽  
Vol 7 (3) ◽  
pp. 353-358 ◽  
Author(s):  
Cai Renye ◽  
◽  
Huang Jin ◽  
Keyword(s):  
Large Scale ◽  
Cell Damage ◽  
Three Dimensional ◽  
Smooth Particle Hydrodynamic ◽  
Direct Write ◽  
Direct Writing ◽  
Modeling And Analysis ◽  
Mesh Free ◽  
Hydrodynamic Method ◽  
The Impact

Cell direct-write, a promising technology for the creation of complex, three-dimensional tissue constructs, has great potential in tissue engineering, biological cytology, high-throughput drug screening and cell sensors. However, it has been found that cell damage due to the mechanical impact during cell direct-write is a possible hurdle for broad applications of fragile cell direct writing. The objective of this paper is to analyze the impact of the continuously jetted cell droplets on the hydro-gel coating substrate. In order to avoid the element distortion due to large-scale deformation, a mesh-free Smooth Particle Hydrodynamic method (SPH), is introduced to study the impact-induced cell mechanical loading profile during cell landing, including effective stress, plastic strain, velocity and acceleration, for better understanding and prediction of possible impact-induced cell damage. It is found that three important impact processes, cell-hydrogel, cellcell and cell-substrate impact, may occur during cell landing. It is concluded to decrease impact-induced cell damage, there are an appropriate firing period and jetting velocity.

Biomechanical Sex Differences of Crewmembers During a Simulated Space Capsule Landing

2014 ◽  
Vol 85 (9) ◽  
pp. 925-929 ◽  
Author(s):  
Honglei Ma ◽  
Yu Zhu ◽  
Yanhua Xiao ◽  
Bingkun Liu ◽  
Xin Jin ◽  
...  
Keyword(s):  
Sex Differences ◽  
Space Capsule

scholarly journals The makeup of a gamete space capsule

Nature Plants ◽  
2018 ◽  
Vol 5 (1) ◽  
pp. 8-8
Author(s):  
Paula Guzmán-Delgado ◽  
Maciej A. Zwieniecki
Keyword(s):  
Space Capsule

scholarly journals On liquid phase hydrates formation in pipelines in the course of gas non-stationary flow

2021 ◽  
Vol 230 ◽  
pp. 01006
Author(s):  
Teimuraz Davitashvili
Keyword(s):  
Natural Gas ◽  
Hydrate Formation ◽  
Stationary Flow ◽  
Problem Solution ◽  
Adiabatic Flow ◽  
Urgent Task ◽  
Gas Hydrate Formation ◽  
Alternative Means ◽  
Hydrodynamic Method ◽  
Formation Of Hydrates

Nowadays, when the emphasis is on alternative means of energy, natural gas is still used as an efficient and convenient fuel both in the home (for heating buildings and water, cooking, drying and lighting) and in industry together with electricity. In industrial terms, gas is one of the main sources of electricity generation in both developed and developing countries. Pipelines are the most popular means of transporting natural gas domestically and internationally. The main reasons for the constipation of gas pipelines are the formation of hydrates, freezing of water plugs, pollution, etc. It is an urgent task to take timely measures against the formation of hydrates in the pipeline. To stop gas hydrate formation in gas transporting pipelines, from existing methods the mathematical modelling with hydrodynamic method is more acceptable. In this paper the problem of prediction of possible points of hydrates origin in the main pipelines taking into consideration gas non-stationary flow and heat exchange with medium is studied. For solving the problem the system of partial differential equations governing gas non-stationary flow in main gas pipeline is investigated. The problem solution for gas adiabatic flow is presented.

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