Learning CFD with ANSYS FLUENT (Workbench)

Use ANSYS Fluent to model internal pipe flow and distinguish laminar and turbulent regimes by Reynolds number. Apply axisymmetric geometry and a 1 m by 0.05 m pipe, with contours and velocity profiles.

Launch ANSYS Workbench, add FLUENT analysis system as Case I, create a 2d rectangular surface in DesignModeler on x-y plane, 1 m by 0.025 m, and set it to fluid.

Create a quadrilateral mesh in ansys workbench by defining domain boundaries (inlet, outlet, wall, axis), applying 0.001 m size, generate, and update the mesh for fluent setup.

Open the Fluent launcher, switch to axisymmetric 2D, note domain extents, assign water as the fluid, set inlet velocity 0.002 m/s, enable SIMPLE coupling, initialize, and run 50,000 iterations.

Explore post processing in ANSYS CFD Post to generate velocity contours, vertical velocity profiles, and five line-velocity charts across a laminar pipe, including mass flow validation in Fluent.

Explore geometry and mesh for turbulent flow using case I's geometry and mesh; duplicate the analysis system to Case II turbulent, then set up and solve to view results.

Set up Fluent with Realizable k-epsilon, set inlet velocity 0.1 m/s and hydraulic diameter 0.05 m, specify turbulence intensity 5.5%, then use second order upwind and run to post processing.

Perform post processing in CFD Post to create velocity contours, six-line horizontal velocity profiles along a pipe, and vertical velocity plots, then verify mass balance via inlet and outlet data.

Compare horizontal and vertical velocity contours for laminar and turbulent flows, note entrance length and fully developed flow, and link parabolic and d-shaped profiles to continuity equation.

Simulate a convergent-divergent nozzle with a density-based solver to study compressible air flow and geometry simplification, focusing on Mach number at the throat and area ratio 2.494.

Create a 2-D nozzle surface in design modeler by generating wall-profile points from the nozzle equation, building lines and a surface, mirroring, and uniting for meshing in fluent.

Create a mapped quadrilateral mesh for a nozzle in ANSYS Fluent Workbench by defining domain boundaries, naming selections, applying 0.01 m surface sizing, and generating the mesh.

Set up a fluent simulation by configuring the solver, switching to density-based flow, enabling the energy equation, using air as ideal gas, applying pressure inlet/outlet, and hybrid initialization, 10,000 iterations.

Explore post processing in fluent using ansys post, including density and mach number contours, exporting results, plotting center-line mach number, generating streamlines, and comparing mass and heat flux differences.

Summarizes workshop two conclusions: analyze density, pressure, velocity and Mach number contours in a supersonic nozzle, compare exit Mach 2.41–2.44, and validate results with area-weighted averages in ANSYS FLUENT.

simulate oil drop spreading under gravity on a 30-degree incline using a VOF multiphase model in ANSYS Fluent, with oil–air domains, geometry simplification, and a 1e-3 transient residual convergence criterion.

Create geometry in ANSYS Workbench DesignModeler by sketching a circle and lines, snapping to origin, trimming, and dimensioning, then generate a mapped 2-D quadrilateral mesh for the fluid zone.

Create a mapped mesh in Ansys by sizing edges with 20, 10, 60, and 40 divisions and a bias growth rate 1.05. Update walls, symmetry, and fluid zones.

Configure Fluent in Workbench for a volume-of-fluid multiphase simulation of air and engine oil. Use hybrid initialization, patch phase 2, and run 5000 steps at 0.0005 s for CFD Post.

Perform post processing to visualize oil flow under gravity using contours of oil volume fraction. Create animations from saved time steps to review the results.

Optimize outlet diameters in a three-outlet pipe to equalize mass flow rates using ANSYS Fluent Workbench, with symmetry geometry and mass flow inlet.

In ANSYS Workbench, create a design modeler geometry by sketching three circles on the y-z plane and extruding to form a cylinder, then parameterize their 0.05 m diameters for meshing.

Learn to create a high-quality mesh in ANSYS meshing by applying inflation layers along walls, configuring boundary and named selections for walls, inlets, outlets, and preparing the model for Fluent.

Configure Fluent setup: use double precision, k-epsilon model, water, inlet mass flow 0.5 kg/s, hydraulic diameter outlets; apply simple with second-order schemes, initialize, run 50,000 iterations, save for design points.

open the design points in post processing and adjust outlet diameters to study how flow rates vary, noting that d1 yields the highest mass flow, followed by d2 and d3.

Use CFD post in workbench to generate velocity and pressure plots along the centerline, then use Excel to compute mean and standard deviation of mass flow rates across design points.

Analyze design point 1 results to optimize the water distribution system by examining velocity and pressure trends along the centerline and adjusting outlet diameters.

Conduct a transient CFD study of fluid leveling between two open reservoirs via a pipe, using air–water VOF with laminar flow, gravity, and observe oscillations, energy decay, and volume-fraction contours.

Create geometry in design modeler by sketching air and water domain, applying vertical constraints and dimensions, performing a domain split with the face split tool, and save the Workbench project.

Set up a 5 mm quadrilateral mesh in ANSYS meshing, generate it, and create named selections for fluid zones, walls, outlets, and interfaces. Update the mesh and proceed to Fluent.

Configure a transient Fluent setup for water–air with Volume of Fluid, laminar flow, double precision, and area-weighted and integral kinetic energy reports; initialize and run for 50 seconds.

Generate and analyze CFD post-processing results using water volume fraction and velocity contours, animate time steps, and create height and kinetic energy plots in Excel to conclude the workshop.

Analyze the final workshop results: damped oscillations settle; observe water volume fraction animation and column height changes toward a mean level near 0.5342 m, with kinetic energy decaying.