Modeling and Simulation of Newtonian Fluid Flow through Two-Dimensional Backward-Facing Step Channel with Finite Element�s Technique

Memon, Ahsan Ali; Shaikh, Hidayatullah; Shah, Baqir Ali; Soomro, Mukhtiar Ali; Shaikh, Abdul Ghafoor; Sheikh, A. H.

doi:10.17485/ijst/2019/v12i32/146075

Cited by 8 publications

(5 citation statements)

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“…e numerical results achieved are compared with the asymptomatic solution provided by the Elder [4]. From our problem, we can describe the following points: [36], [37][38][39] (1) e drag force on the front face of the circular cylinder is increasing with the increase in the Reynolds number. (2) In the steady-state ow, the two vortexes can be seen at the end of the boundary of the cylinder, and the length of that vortices is the function of the Reynolds number and increases with the increase in the Reynolds number.…”

Section: Discussionmentioning

confidence: 99%

Modelling and Simulation of Fluid Flow through a Circular Cylinder with High Reynolds Number: A COMSOL Multiphysics Study

Memon

Bhatti

et al. 2022

Journal of Mathematics

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In this study, we intend to investigate the steady-state and laminar flow of a viscous fluid through a circular cylinder fixed between two parallel plates keeping the aspect ratio of 1 : 5 from cylinder radius to height of the channel. The two-dimensional, incompressible fluid flow problem has been simulated using COMSOL Multiphysics 5.4 which implements finite element’s procedure. The flow pattern will be investigated by using the Reynolds number from 100 to 1000. The reattachment length formed at the back of the cylinder and drag force when the fluid comes to strike with the front surface of the cylinder is expressed in terms of Reynolds numbers. We propose to calculate the velocity and the pressure before and after the cylinder. For this purpose, two-line graphs before and after the cylinder will be drawn to check the impact of cylinder on both velocity and pressure. It was found that the percentage change in the velocity as well as pressure before to after the cylinder is changing their behaviours at Re = 700. The study is important because the empirical equations between the vortex’s lengths formed along the cylinder using the linear regression process obtained in this study may be used for future implementation.

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Section: Discussionmentioning

confidence: 99%

Modelling and Simulation of Fluid Flow through a Circular Cylinder with High Reynolds Number: A COMSOL Multiphysics Study

Memon

Bhatti

et al. 2022

Journal of Mathematics

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“…2 In this study the prevalence rate 17.99%, showing that HCV10.88% is more prevalent than HBV5.74% and combine 1.36%, which is also reported in the study of Muhammad Rafique Memon which is 33 (3.61%) patients were found HBsAg positive and 117 (12.8%) were Anti-HCV positive, while 9 (0.98%) were positive for both during preoperative workup. 13 A review of literature showed that most of the infected patients had positive risk factors i.e. history of injection drug abuse, blood transfusion and chronic hepatitis.…”

Section: Discussionmentioning

confidence: 99%

HEPATITIS B & C;

Tagar¹,

Abbasi

Pathan

et al. 2017

TPMJ

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Objectives: To determine the frequency of hepatitis b & c viral infection insurgical patients. Study Design: Descriptive case series. Place and Duration of Study: Thisstudy was conducted at surgical department of multiple hospitals and compares the results,JPMC Karachi, Civil Hospital Naushahro Feroze and Jamshoro, Pakistan from August 2014 toDecember 2015. Methodology: All 2645 patients were admitted for emergency and electivesurgery. All patients taken detail history regarding demographic parameter and risk factorslike previous surgery, blood transfusion, barbar, Road Traffic accident, haemodialysis, Tattoos/body piercing, injecting drug user, family history of hepatitis, previous history of jaundiceand Hospitalization. Hospital laboratory was used for screened HBsAg and Anti HCV usingimmunochromatography (ICT method). Patients excluded who were those did not need thesurgery or known case of HBsAg and Anti HCV. Data collected was entered into and analyzedby using statistical package for the social science – 20. Results: Out of 2645 patients, maleto female ratio were 1.9:1. The mean age was 40.2+6.12years (20 to 60 years). Out of 2645patients, Anti HCV was positive in 288(10.88%) cases followed by HBsAg was in 152(5.74%)cases. While both positive in 36 (1.36%) cases. We observed Previous surgery was main riskfactor in the reactive 156(32.77%) cases followed by Barbar, Blood transfusion were 74(15.54%)and 47(9.87%) respectively. Conclusion: We conclude that preoperatively screening of hepatitisB and C should be performed.

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“…A finite element method employing the least square technique of Galerkin's procedure is employed for power-law fluids within the non-Newtonian model, spanning the range from 0.8 to 1.2. Numerous research contributions related to this methodology have been published in reputable journals and conferences [30][31][32][33][34][35], with verification against the asymptotic solution illustrated in [36].…”

Section: Introductionmentioning

confidence: 99%

On the Analysis of Power Law Fluid over a Diamond Shaped Cylindrical Surface with Screen Boundary Conditions at High Reynolds Number

Memon,

Shaikh

et al. 2024

DDF

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This study analyses physical aspects of power-law fluid flow over a diamond shaped cylinder under the impact of a movable screen fixed in the middle of a channel keeping an aspect ratio as 0.5 with height of the channel. The perforated plate is a screen at the middle especially settled at orientation of π/6, π/4 or π/3 degrees. The Reynolds number (Re) has been kept in the range of 1000-10,000 with power-law index in the range 0.8-1.2. For the corresponding two-dimensional problem, the governing momentum equations coupled with energy equation have been solved numerically using non-isothermal laminar fluid flow interface in the software COMSOL Multiphysics 5.4. The dimensionless velocity magnitude and the non-dimensional temperature on the diamond shaped cylinder along the vertical non-dimensional length are expressed via fixing any two parameters from (Re), angle of screen θ and power-law index. The heat transfer coefficient, effective thermal conductivity and the Nusselt number are also expressed besides the dimonsionless length of the surface of the chosen cylinder. In conclusion, we will be going to suggest points to increase the dynamics and thermal variables with the use of selected parameters Re, θ, and power law index n.

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Modeling and Simulation of Newtonian Fluid Flow through Two-Dimensional Backward-Facing Step Channel with Finite Element�s Technique

Cited by 8 publications

References 0 publications

Modelling and Simulation of Fluid Flow through a Circular Cylinder with High Reynolds Number: A COMSOL Multiphysics Study

Modelling and Simulation of Fluid Flow through a Circular Cylinder with High Reynolds Number: A COMSOL Multiphysics Study

HEPATITIS B & C;

On the Analysis of Power Law Fluid over a Diamond Shaped Cylindrical Surface with Screen Boundary Conditions at High Reynolds Number

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