INTERSTITIAL FLUID FLOW BEHAVIOR IN OSTEON WALL UNDER NON-AXISYMMETRIC LOADING: A FINITE ELEMENT STUDY

2018 ◽  
Vol 18 (07) ◽  
pp. 1840007
Author(s):  
XIAO-GANG WU ◽  
TENG ZHAO ◽  
XIAO-HONG WU ◽  
JIANG-LAN XIE ◽  
KUI-JUN CHEN ◽  
...  
Keyword(s):  
Finite Element ◽  
Fluid Flow ◽  
Axial Compression ◽  
Flow Behavior ◽  
Pressure Amplitude ◽  
Interstitial Fluid Flow ◽  
Compression Loading ◽  
Velocity Amplitude ◽  
Bone Fluid Flow ◽  
Loading Case

Physiological loads are non-axisymmetric and can lead to interstitial bone fluid flow, particularly in osteon. According to research, interstitial bone fluid flow plays a key role in bone mechanotransduction. To evaluate the poroelastic responses of a non-axisymmetric loaded osteon, this paper presents a finite element osteon model that is bulit by using the Comsol Multiphysics software. Obtained results show that under the same loading amplitude, the generated pressure and velocity amplitudes in the axial compression loading case are the largest, followed by that in the compressive bending loading, and smallest in the bending case. Moreover, the induced pressure and velocity amplitudes in axial compression loading exhibit an axial symmetrical distribution and axial centrosymmetric distribution in the compressive bending. In the bend loading case, the pressure amplitude presents an antisymmetric distribution, but the velocity amplitude is axially symmetrically distributed. Therefore, the distributions of pressure and velocity are definitely affected by load types, which lead to different bone fluid stimuli in mechanotransduction.

Numerical investigation of in-mold electromagnetic stirring process for fluid flow and solidification

2017 ◽  
Vol 36 (4) ◽  
pp. 1106-1119 ◽  
Author(s):  
Ambrish Maurya ◽  
Pradeep Kumar Jha
Keyword(s):  
Finite Element ◽  
Fluid Flow ◽  
Continuous Casting ◽  
Finite Volume ◽  
Flow Behavior ◽  
Hybrid Approach ◽  
Liquid Core ◽  
Electromagnetic Stirring ◽  
Solid Shell ◽  
Content Type

Purpose The purpose of present investigation is to analyze the in-mold electromagnetic stirring (M-EMS) process and the effect of stirrer frequency on fluid flow and solidification in a continuous casting billet caster mold. Design/methodology/approach A hybrid approach involving finite element and finite volume method has been used for the study. Finite element model is used to calculate time variable magnetic field, which is further coupled with fluid flow and solidification equations for magneto-hydrodynamic analysis with finite volume model. Findings Results show that though superheat given to steel before its entry into the mold is quickly removed, solid shell formation is delayed by the use of M-EMS. Final solid shell thickness, however, is slightly reduced. Increase in frequency is found to increase the magnetic flux density and tangential velocity of liquid steel and decrease in diameter of liquid core. Practical implications The work is of great industrial relevance. The model may be used to design industrial setup of in-mold electromagnetic stirrer and process could be analyzed and optimized numerically. Originality/value The paper evaluates the influence of M-EMS and its frequency on solidification and flow behavior in the continuous casting mold. The iso-surface temperatures from pouring temperature to liquidus temperature inside the mold have been shown. The findings may be useful for the steelmakers to reduce the defect in continuous casting.

Oscillatory Bone Fluid Flow and its Role in Initiating Remodeling in the Absence of Matrix Strain

2001 ◽  
Author(s):  
Yixian Qin ◽  
Anita Saldanha ◽  
Tamara Kaplan
Keyword(s):  
Fluid Flow ◽  
Cellular Response ◽  
Fluid Shear Stress ◽  
Bone Matrix ◽  
Fluid Pressure ◽  
Streaming Potential ◽  
Bone Adaptation ◽  
Interstitial Fluid Flow ◽  
Bone Fluid Flow ◽  
Matrix Deformation

Abstract Load-generated intracortical fluid flow is proposed to be an important mediator for regulating bone mass and morphology [1]. Although the mechanism of cellular response to induced flow parameters, i.e., fluid pressure, pressure gradient, velocity, and fluid shear stress, are not yet clear, interstitial fluid flow driven by loading may be necessary to explain the adaptive response of bone, which is either coupled with load-induced strain magnitude or independent with matrix strain per se [2]. It has been demonstrated that load-induced intracortical fluid flow is contributed by both bone matrix deformation and induced intramedullary (IM) pressure [3]. To examine the hypothesis of fluid flow generated adaptation, it is necessary to test the mechanism under the circumstances of solely fluid induced bone adaptation in the absence of matrix deformation. While our previous data has demonstrated that bone fluid flow and its associated streaming potential product can be influenced by the dynamic IM pressure quantitatively [4], the objective of this study was to evaluate fluid induced bone adaptation in an avian ulna model using oscillatory IM fluid pressure loading in the absence of bone matrix strain. The potential fluid pathway was measured in the model.

scholarly journals Hydro Magnetic Effect on Thread Stretching Surface with Mounted Obstacles in Porous Medium

2021 ◽  
Vol 16 ◽  
pp. 95-105
Author(s):  
Mohammad Mohsen Peiravi ◽  
Pooya Pasha ◽  
Davood Domairry Ganji
Keyword(s):  
Magnetic Field ◽  
Finite Element ◽  
Fluid Flow ◽  
Stretching Sheet ◽  
Flow Behavior ◽  
Maximum Amount ◽  
Maximum Temperature ◽  
Fluid Temperature ◽  
A Value ◽  
Fluid Concentration

In this paper, Finite element Model is applied for investigation of fluid flow over a stretching sheet in existence of magnetic field. Finite element method is applied to find the influence of melting heat transfer on fluid flow behavior over a stretching sheet in presence of magnetic field. we investigated the flow of fluid flowing through the fins plate under the influence of the magnet. The fins were on the board and the end of the plate. In the case of chamfer fins, the maximum temperature variation is observed. In this fins, the maximum temperature of T = 2.5 and minimum temperature is T = 3. in general, we conclude that the temperature flow around the rectangular fins has a maximum value than 2 other modes. In triangular fins, the fluid temperature vector around the fins has more intensity than other modes and the temperature gradient around it is larger than the previous one and the fluid flow at the end of the plate also has more temperature than the Rectangular fins. The maximum amount of fluid concentration has been observed around the first fin of chamfer mode in range of X=0.05 to X=0.1. In general, the fluid concentration around the triangular fins is higher than other modes. the maximum amount of fluid concentration is found in the triangular fins on the surface. Their concentration from the first fin reaches a value of 2.5 and in the last fin at a value of 1.4.

Experimental and numerical studies on failure and energy absorption of composite thin-walled square tubes under quasi-static compression loading

2020 ◽  
Vol 21 (6) ◽  
pp. 623-634
Author(s):  
Haolei Mou ◽  
Zhenyu Feng ◽  
Jiang Xie ◽  
Jun Zou ◽  
Kun Zhou
Keyword(s):  
Finite Element ◽  
Shell Model ◽  
Energy Absorption ◽  
Failure Mode ◽  
Failure Criterion ◽  
Finite Element Models ◽  
Static Compression ◽  
Compression Loading ◽  
Thin Walled ◽  
Simulation Results

AbstractTo analysis the failure and energy absorption of carbon fiber reinforced polymer (CFRP) thin-walled square tube, the quasi-static axial compression loading tests are conducted for [±45]3s square tube, and the square tube after test is scanned to further investigate the failure mechanism. Three different finite element models, i.e. single-layer shell model, multi-layer shell model and stacked shell mode, are developed by using the Puck 2000 matrix failure criterion and Yamada Sun fiber failure criterion, and three models are verified and compared according to the experimental energy absorption metrics. The experimental and simulation results show that the failure mode of [±45]3s square tube is the local buckling failure mode, and the energy are absorbed mainly by intralaminar and interlaminar delamination, fiber elastic deformation, fiber debonding and fracture, matrix deformation cracking and longitudinal crack propagation. Three different finite element models can reproduce the collapse behaviours of [±45]3s square tube to some extent, but the stacked shell model can better reproduce the failure mode, and the difference of specific energy absorption (SEA) is minimum, which shows the numerical simulation results are in better agreement with the test results.

scholarly journals On the characterization of interstitial fluid flow in the skeletal muscle endomysium

2020 ◽  
Vol 102 ◽  
pp. 103504 ◽  
Author(s):  
Qiuyun Wang ◽  
Shaopeng Pei ◽  
X. Lucas Lu ◽  
Liyun Wang ◽  
Qianhong Wu
Keyword(s):  
Skeletal Muscle ◽  
Fluid Flow ◽  
Interstitial Fluid ◽  
Interstitial Fluid Flow
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