Influence of divergent length on the gas-particle flow in dual hose dry ice blasting nozzle geometry

Mat, Mohamad Nur Hidayat; Asmuin, Norzelawati; Basir, Faisal Md; Goodarzi, Marjan; Rahman, Muhammad Faqhrurrazi Abd; Khairulfuaad, Riyadhthusollehan; Jabbar, Balasem Abdulameer; Kasihmuddin, Mohd Shareduwan Mohd

doi:10.1016/j.powtec.2020.01.060

Cited by 23 publications

(13 citation statements)

References 22 publications

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“…There is no significant effect of groove on the velocities and turbulence intensities, as observed by comparing the corresponding plots because of experiencing much stress across the nozzle all the way up to the ringed nozzle exit. These results are in agreement with Yu et al [5] as the study reported little effect of groove extending or exit the nozzle on the characteristics of fluid flow. It is of significance, as understanding it will help in considering its effect in firefighting, so that necessary changes in the model can be suggested.…”

Section: Resultssupporting

confidence: 93%

“…There are various sizes, styles, and shapes of nozzles with a large number of combinations that can be used to encounter the hydraulics problem on the fire ground [4]. The combination of nozzles with different engineer-ing applications is used to generate sprays and jets [5]. They are also widely used as aviation systems, maritime systems, automotive systems, and industrial systems as single equipment or part of equipment [6].…”

Section: Introductionmentioning

confidence: 99%

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Determining the effect of nozzle groove on the fluid flow through viscous 2D planar fluid

Younis¹,

Ahmed²,

Hamdan³

et al. 2021

J Appl Eng Science

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The study aims to determine the effect of nozzle groove on fluid flow through viscous 2D planar fluid. To fulfil the study’s aim, numerical method was adopted to introduce grooves of different dimensions from the nozzle exit. The study adopts SoldWork software was used to design nozzles and introduce groove shaped nozzles, each consisting of six different designs. The nozzle base model used in this study was similar to the one used in a previous study. The procedure was performed with different pressures (8, 10, and 12 bar) at the similar firefighting nozzle. The velocities contours were predicted based on the choice of nozzle section during the numerical stimulation. The results of present study demonstrated a new approach that can be used for increasing velocity at various types of modified nozzles through grooves at different pressures and locations. For grooves, dimensions 1×1 (mm) and location 15 mm at 8 bar, 10 bar and 12 bars showed no effect on velocity as it reduces velocity by increasing surface area. The velocity increases with increasing pressure in proportion relationship. This clearly explains that the groove has no effect on velocity as it increases due to increase in pressure. This is because the groove reduces the velocity by increasing surface area. The study concludes that use of groove increases velocity of water that further improves nozzles operation.

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Section: Resultssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Determining the effect of nozzle groove on the fluid flow through viscous 2D planar fluid

Younis¹,

Ahmed²,

Hamdan³

et al. 2021

J Appl Eng Science

View full text Add to dashboard Cite

show abstract

“…In the ANSYS, there are four operation mesh mode can be done. The process was beginning with specifying the global mesh setting, inserting a local mesh setting, generating the mesh and checking mesh quality [22][23]. By using proximity and curvature, the curve object (cylinder) and square object (box) can be pick as the convergent segment.…”

Section: Meshing Of Actuator Nozzle Inside the Pmdi Devicementioning

confidence: 99%

Influence of Actuator Nozzle Angle on the Flow Characteristics in Pressurized-Metered Dose Inhaler Using CFD

Rahman¹,

Asmuin²,

Taib³

et al. 2020

CFDL

Self Cite

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Pressurized metered dose inhalers (pMDIs) are often used for the treatment of asthma and chronic obstructive pulmonary disease. This device is easy to carry, highly effective and extremely safe, allowing reliable, consistent dosage delivery, metered dose inhalers are the inhalation devices that doctors and patients can readily select from around the world. This pMDI inhaler system has a problem which is the particle does not penetrate into the alveolar. ANSYS Fluent Version 19.2 was used to find the best angle of the actuator nozzle by parametric analysis. Standard K-epsilon was used as the turbulence model with enhanced wall treatment function. Discrete phase model (DPM) was applied to represent the particle flow. The result shows the best actuator nozzle angle is 120-degree which affects the maximum magnitude of particle velocity.

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“…In the ANSYS, there was four operation mesh mode can be done. The process was beginning with specifying the global mesh setting, inserting a local mesh setting, generating the mesh and checking mesh quality [23,24]. By using proximity and curvature, the curve object (cylinder) and square object (box) can be pick as the convergent segment.…”

Section: Meshing For New Design (Aerocup) and Commercial Design A Model Of MDI Disposable Inhaler Spacermentioning

confidence: 99%

Investigate Flow Characteristics of Metered-Dose Inhaler (MDI) Disposable Inhaler Spacer (AeroCup) for COVID-19 Patient by using Computational Fluid Dynamic (CFD)

Rahman

Asmuin

Taib

et al. 2020

CFDL

Self Cite

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Coronavirus disease 2019 (COVID-19) caused by severe acute respiratory coronavirus-2 syndrome (SARS-CoV-2) were first reported by officials in Wuhan City, China, in December 2019. COVID-19 patients have a symptom of respiratory pneumonia diseases which have difficulties in breathing normally. Previously, the nebulizer machine commonly used to treat respiratory pneumonia diseases. However, the usage for this machine was not suggested during this COVID-19 period because the virus will be spread off easily. To overcome these shortcomings, the uses of Metered-Dose Inhaler (MDI) with MDI disposable inhaler spacer is preferable. Besides, it had been known that the used of MDI disposable inhaler spacer helps to increase the uptaking of the drug into the lung. Besides that, the high demand for the MDI Disposable Inhaler Spacer in the hospital, causing a shortage of supply in Malaysia. Thus, this study aims to produce a new design of this spacer to full fill the market need. This new design of MDI Disposable Inhaler Spacer (AeroCup) was designed by using Solid Work 2018. Then, the parameters for flow characteristic such as particle velocity magnitude, velocity, Eddy viscosity, turbulence Eddy dissipation and turbulence kinetic energy (TKE) was successfully characterized and compared with commercial design A using ANSYS Fluent Version 19.2. The result showed that new design (AeroCup) had the desired characteristic, which was almost similar to commercial design A. This study can provide a piece of information to produce the low-cost metered-dose inhaler (MDI) disposable inhaler spacer to enlighten the burden shouldered by front liners, especially during the pandemic and also can scale-up the economic viability.

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Influence of divergent length on the gas-particle flow in dual hose dry ice blasting nozzle geometry

Cited by 23 publications

References 22 publications

Determining the effect of nozzle groove on the fluid flow through viscous 2D planar fluid

Determining the effect of nozzle groove on the fluid flow through viscous 2D planar fluid

Influence of Actuator Nozzle Angle on the Flow Characteristics in Pressurized-Metered Dose Inhaler Using CFD

Investigate Flow Characteristics of Metered-Dose Inhaler (MDI) Disposable Inhaler Spacer (AeroCup) for COVID-19 Patient by using Computational Fluid Dynamic (CFD)

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