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Journal Bearing CFD analysis and validation
Rating: 4.2 out of 5(17 ratings)
211 students

Journal Bearing CFD analysis and validation

CFD analysis of Journal bearing and validation with data from Shigley's Mechanical Engineering Design book
Created bySijal Ahmed, Malik Muhammad Awais
Last updated 7/2023
English

What you'll learn

  • General understainding of bearings and in particular journal bearings
  • Learning about important parameters of journal bearings and how to obtain them such as boundry conditions, material properties, Reynolds number etc
  • Settings up journal bearing CFD analysis and gettting results
  • Validation of important parameters with graphs from Shigly's Mechanical Engineering Design

Course content

6 sections • 16 lectures • 4h 19m total length

  • Introduction to this course6:29

    Explore journal bearing CFD analysis from basics to validation against Shigley data, covering Sommerfeld and Reynolds numbers, cavitation, boundary conditions, and the CFD workflow from SpaceClaim to Fluent.

  • Course structure and file managment5:21

    Explore the journal bearing CFD analysis and validation through a structured course featuring geometry creation, hex meshing, fluent CFD, and parametric studies of eccentricity and RPM.

  • Introduction to Bearings13:06

    Explore bearings from ball, roller, and plain types to hydrostatic and hydrodynamic fluid bearings, with journal bearing basics and CFD introduction to journal bearing with L/D=1 and eccentricity 0.25.

  • Journal bearing and important parameters30:15

    Explore the fluid journal bearing, including hydrodynamic and hydrostatic lubrication, film thickness, eccentricity and clearance effects, pressure distribution, Sommerfeld number, and cavitation models in cfd.

  • Important parameters for CFD simulation15:01

    Explore key cfd parameters for journal bearing analysis, including eccentricity, clearance, L/D, Reynolds and summerfield numbers, and how geometry, meshing, and a viscosity udf yield pressure and temperature distributions.

Requirements

  • This course assumes that you have basic knowledge about CFD and mechanical engineering
  • ANSYS Workbench 2022 R1 is installed on your computer, although you can use other versions also, but there may be some changes in GUI etc
  • But I tried my best to cover every thing from scratch, so I hope you dont need much background in starting this course

Description

Journal bearing is an important component of any machine such as in crankshaft of automobile engine. It helps to reduce friction and allow motion in required direction and restrict them in other direction. There is different type of bearings such as ball bearing, roller bearing, journal bearing etc. In this course we are going to solve numerically journal bearing with given conditions and geometric parameters. At the end of course you will validate CFD results shown in this course with data from Shigley's Mechanical Engineering Design Book.

First, we will start with discussion on bearings and types. Then we will discuss about the journal bearings, different terms such as eccentricity, eccentricity ratio, clearance. We will also discuss the design parameters for journal bearing solved in this course as well. After that we will discuss about the material properties, whether flow is laminar or turbulent, Sommerfeld number and corresponding optimum parameters from Shigley's book. We will also go through modelling approaches such a full Sommerfeld, half Sommerfeld or cavitation modelling through multiphase modelling in CFD. Then we will create geometry in Spaceclaim, hexa mesh in ICEMCFD and subsequently problem setup and simulation in Fluent.

After solving problem in Fluent, we will obtain results by post processing in Fluent and CFD post. Specially plotting the static pressure around circumference of journal and displaying it as pressure vs angular coordinates from 0 to 360 degrees. We will also find out the value of loading on bearing in reverse fashion by finding out the value of maximum pressure and maximum pressure ratio of film thickness. We will also show the angular position of maximum pressure and zero pressure. We will compare them with data we get from Shigley's Mechanical Engineering Design Book. I have found that resultss are matching very well and thus validation is done perfectly.

Who this course is for:

  • This course is designed for undergrad, MS and PhD students. This course will also help you in your professional life.

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