Effect of Multi Size Porous Media Properties on the Flow of Non-Darcy Regime

Bded, Asaad Salim; Rashid, Farhan Lafta

doi:10.37934/arfmts.68.1.6372

Cited by 4 publications

(4 citation statements)

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“…Based on the technical data sheet provided by the supplier, the epoxy resin had already reached the limit of the pot lifetime. Assad and Farhan [19] suggest that multi size porous media is effect on the flow rate of liquid and in this work is fibre reinforcement diameter. It can conclude that the infusion process on glass fibre using radome mould is not recommended to be applied unless high permeability material is such as infusion mesh flow or medium flow for vacuum infusion to help expedite infusion filling time.…”

Section: Resultsmentioning

confidence: 61%

Vacuum Infusion Simulation for Radome Manufacturing Using Woven Flax Fibre and Glass Fibre

Haris

Aris

Zulkifli

et al. 2021

ARFMTS

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The vacuum infusion method is emerging to produce composite parts, especially thin wall structure aircraft radome. Ansys Fluent is used in the optimization phase for mould filling analysis on aircraft radome part. The permeability fibre is referring to the physical property of the fibre reinforcement to allow fluids to permeate it, thus it is correlated with the viscosity of the resin used. In this work, flax fibre, glass fibre and low viscosity epoxy resin are used to determine the permeability value of flax fibre, glass fibre and hybrid without using a flow medium. In-plane experiment on reinforcement fibre permeability is conducted and all reinforcement fibre have similar fibre architecture and weight. The development of a digital model from a top partial aircraft radome is obtained through a 3D scanner and CATIA. Ansys Fluent is used to optimize the location of the injection line and air vent for the epoxy. The Ansys Fluent analysis model is validated through the in-plane experiment filling time result for a flat model. Based on the simulation analysis, the location of the injection line is placed at the perimeter and the air vent at the centre. The filling time from the simulation for the flax fibre and hybrid fibre was estimated around 10 to 11 minutes. However, the filling time for glass fibre is approximate 2 hours which is longer than epoxy gel time. Furthermore, this method can be used in mould filing scenarios of thin wall structure within gel time of the resin.

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Section: Resultsmentioning

confidence: 61%

Vacuum Infusion Simulation for Radome Manufacturing Using Woven Flax Fibre and Glass Fibre

Haris

Aris

Zulkifli

et al. 2021

ARFMTS

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“…In another word, a momentum term is added to the standard liquid flow equation resulting in both viscous and inertial force loss terms. Subsequently, in an isotropic medium, the liquid pressure drop equation based on the vicious and inertial force losses can be presented as below 53

normalΔ p_{liq} = ((), R_{vis} \cdot μ_{liq} \cdot u_{liq}^{\sup} + \frac{R_{inr} \cdot ρ_{liq} \cdot {u_{italicliq}^{italicsup}}^{2}}{2}) \cdot l_{\mod}^{eff}

where R vis is viscous resistance (reciprocal to Darcy's permeability) and R inr is inertial resistance.…”

Section: Methodsmentioning

confidence: 99%

“…Subsequently, in an isotropic medium, the liquid pressure drop equation based on the vicious and inertial force losses can be presented as below. 53 Δp liq = R vis Áμ liq Áu…”

Section: Theoretical Modelmentioning

confidence: 99%

In silico simulation of the liquid phase pressure drop through cylindrical hollow‐fiber membrane oxygenators using a modified phenomenological model

Tabesh

Rafiei

Mottaghy

2021

Asia-Pacific J Chem Eng

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Low blood pressure drop is an important performance characteristic of a hollow‐fiber membrane oxygenator (HFMO). While the application of natural blood corresponds to complex handling procedures, the in vitro investigation of liquid pressure drop is mainly done using water or similar fluids (e.g., normal saline solution [NSS]). In this study, a comprehensive phenomenological model has been proposed to predict the liquid pressure drop through a cylindrical HFMO, considering viscous and inertial resistances in porous media, derived from literature. The results demonstrate that approaches based on Darcy–Weisbach phenomenological equation correlate the most with in vitro experimental investigations using NSS and native porcine blood, in both pediatric and adult commercially available cylindrical HFMOs. Remarkably, this study corroborates theoretically and experimentally that approaches based on Ergun semi‐empirical equation fail to predict the liquid pressure drop in cylindrical HFMOs. Moreover, it is shown that the presented phenomenological model is also applicable to cylindrical hollow‐fiber heat exchangers, and subsequently, its noticeable effect on total liquid pressure drop through cylindrical HFMOs is demonstrated. The results reveal that this component may contribute to almost half of total blood pressure drop, and therefore, it should be redesigned using other approaches than hollow fibers.

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“…The second unanswered aspect of non-linear Bltration through porous media is the identiBcation of the onset of non-linear Bltration. Based on the nature of resistive forces, gravitational Cow through any saturated porous media can be primarily divided into three macroscopic Cow regimes, i.e., laminar, transition and turbulent (Bded and Rashid 2020). It has been largely accepted that Darcy's linear model is valid for Cow in laminar regime only (Arthur 2018).…”

Section: Introductionmentioning

confidence: 99%

Influence of fluid viscosity and flow transition over non-linear filtration through porous media

et al. 2021

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The present study investigates two important though relatively unexplored aspects of non-linear Bltration through porous media. The Brst aspect is the inCuence of viscosity variation over the coefBcients of the governing equations used for modelling non-linear Bltration through porous media. Velocity and hydraulic gradient data obtained for a wide range of Cuid viscosities (8.03E-07 to 3.72E-05 N/m 2 ) were studied. An increase in Cuid viscosity resulted in an increased pressure loss through packing which can be quantiBed using the coefBcients of the governing equations. CoefBcients of Forchheimer equation represent linearly increasing trend with the kinematic viscosity. On the other hand, coefBcient of Wilkins equation represents similar values for different Cuid viscosities and remained unaffected by the variation in packing properties. Obtained data were utilized to understand the nature of Cow transition in porous media. Behaviour of polynomial and Power-law coefBcient with variation in Cow velocity were also examined. Critical Reynolds number corresponding to the deviation of Cow from Darcy regime varies with the porous packing and was observed to be in the range of 0-100. CoefBcients of polynomial (Forchheimer) model were observed to be independent of the range of Cow velocity, whereas the Power law coefBcients are extremely sensitive to the data.

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Effect of Multi Size Porous Media Properties on the Flow of Non-Darcy Regime

Cited by 4 publications

References 0 publications

Vacuum Infusion Simulation for Radome Manufacturing Using Woven Flax Fibre and Glass Fibre

Vacuum Infusion Simulation for Radome Manufacturing Using Woven Flax Fibre and Glass Fibre

In silico simulation of the liquid phase pressure drop through cylindrical hollow‐fiber membrane oxygenators using a modified phenomenological model

Influence of fluid viscosity and flow transition over non-linear filtration through porous media

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