CFD Investigation of Reynolds Flow around a Solid Obstacle

Patel, Ruchita; Khan, Zulfiqar Ahmad; Saeed, Adil; Bakolas, Vasilios

doi:10.3390/lubricants10070150

Cited by 2 publications

(7 citation statements)

References 48 publications

(67 reference statements)

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“…The analytical equations for a 2D simple wedge problem have been described in the literature [23]. For the parameters shown in the table, a simple wedge problem has been solved using three different methods, and the produced pressure distribution (see Figure 3) demonstrates good agreement in the results.…”

Section: Simple Wedge Problemmentioning

confidence: 98%

“…Similar geometries have also been used in literature to simplify the mixed lubrication problem [11]. The Lubrication-Contact Interface Conditions (LCICs) have been adopted to ensure that no physical flow can pass through the interface [23]. Hence, a novel and advanced deterministic model has been designed to numerically simulate the converging wedge film with solid asperity contact to determine the fluid pressure using the Reynolds equation.…”

Section: Modelling Approachmentioning

confidence: 99%

“…It's been presumed that the contact surfaces are smooth with no-slip boundary conditions. For greater stability, accuracy, and convergence in fluid simulation, the structured mesh has been designed using the ICEM CFD software [23,26] . The mesh sensitivity analysis has been conducted for each model.…”

Section: Cfd Model Setupmentioning

confidence: 99%

“…To compare results with CFD we must make sure that the flow is laminar. It has recently been reported that in order to compare FDM with CFD for simple wedge problems, we require the wedge problem to be solved for the line contact [23].…”

Section: Full Multigrid Approachmentioning

confidence: 99%

See 3 more Smart Citations

Numerical Simulation of the Lubricant-Solid Interface Using the Multigrid Method

Patel¹,

Khan²,

Bakolas³

et al. 2023

Preprint

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Solid asperity interactions are common and inevitable under severe loading conditions for any lubricated contact. Heavy-duty machine components (gear, bearings etc.) generally operate under Mixed Lubrication, where uneven surface features contact each other when generated fluid pressure is not enough to support the external load. The Reynolds equation is commonly used to simulate smooth lubricated contacts numerically. In rough lubricated interfaces where opposite surface asperities make contact, the Reynolds equation alone cannot accurately predict pressure using the traditional numerical simulation method. In this paper, Lubrication-Contact interface conditions (LCICs) have been implemented and extended to solve the multiple asperity contact problem using the full-multigrid approach. The developed novel algorithm has significantly accelerated the solution process and improved the accuracy and efficiency of pressure calculation for fluid-solid sub-interactions that can occur under ML regions. The Finite Difference Method (FDM) results have been compared with Computational Fluid Dynamics (CFD) simulation to validate the newly developed model. Hence, the proposed optimized solution method will provide valuable insight to researchers and industry engineers interested in simulating the ML problem where the effect of the fluid-solid interface can be captured effectively to improve reliability in the calculation of the life expectancy of the lubricated parts.

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Section: Simple Wedge Problemmentioning

confidence: 98%

Section: Modelling Approachmentioning

confidence: 99%

Section: Cfd Model Setupmentioning

confidence: 99%

Section: Full Multigrid Approachmentioning

confidence: 99%

See 2 more Smart Citations

Numerical Simulation of the Lubricant-Solid Interface Using the Multigrid Method

Patel¹,

Khan²,

Bakolas³

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…In all the CFD models used in this study, it has been assumed that the upper and lower contact surfaces are smooth with no-slip boundary conditions, and to represent fluidsolid interaction (see Figure 3), solid asperities have been designed at the middle of the fluid domain. According to previous research [28,29], it is generally advised to use structural quadrilateral meshes instead of unstructured triangular meshes in fluid simulation using CFD, because they provide better stability, accuracy, and convergence. Therefore, in our CFD models, we have employed a quadrilateral mesh type, which was created using ICEM CFD software (ANSYS 2022).…”

Section: Cfd Model Setupmentioning

confidence: 99%

Numerical Simulation of the Lubricant-Solid Interface Using the Multigrid Method

et al. 2023

Self Cite

View full text Add to dashboard Cite

Solid asperity interactions are common and inevitable under severe loading conditions for any lubricated contact. Heavy-duty machine components (gears, bearings, etc.) generally operate under Mixed Lubrication (ML), where uneven surface features contact each other when the generated fluid pressure is not enough to support the external load. The Reynolds equation is commonly used to simulate smooth lubricated contacts numerically. In rough lubricated interfaces where opposite surface asperities make contact, the Reynolds equation alone cannot accurately predict pressure using the traditional numerical simulation method. In this paper, lubrication–contact interface conditions (LCICs) have been implemented and extended to solve the multiple asperity contact problem using the full-multigrid approach. The developed novel algorithm has significantly accelerated the solution process and improved the accuracy and efficiency of pressure calculation for fluid–solid sub-interactions that can occur in ML regions. The results of the finite difference method (FDM) results have been compared with those of computational fluid dynamics (CFD) simulation to validate the newly developed model. Hence, the proposed optimized solution method will provide valuable insight to researchers and industry engineers interested in simulating the ML problem where the effect of the fluid–solid interface can be captured effectively to improve reliability in the calculation of the life expectancy of the lubricated parts.

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CFD Investigation of Reynolds Flow around a Solid Obstacle

Cited by 2 publications

References 48 publications

Numerical Simulation of the Lubricant-Solid Interface Using the Multigrid Method

Numerical Simulation of the Lubricant-Solid Interface Using the Multigrid Method

Numerical Simulation of the Lubricant-Solid Interface Using the Multigrid Method

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