How Do You Run a Flow Simulation in SolidWorks?

Running a Flow Simulation in SolidWorks is a powerful tool that allows engineers and designers to analyze fluid flow and heat transfer effects on their designs. Whether you are working on a simple pipe system or a complex aerodynamic model, SolidWorks Flow Simulation can provide valuable insights into the behavior of fluids and optimize your designs. In this tutorial, we will walk through the steps of running a flow simulation in SolidWorks.

Step 1: Setting up the Geometry
To begin, you need to have a 3D model of your design in SolidWorks. Ensure that the geometry is complete and accurate before proceeding with the flow simulation. It is recommended to save a separate copy of your model specifically for the flow simulation to avoid any unintended changes to the original design.

Tip: If your model consists of multiple bodies or components, use the Combine tool in SolidWorks to merge them into a single body. This will ensure accurate results during the flow simulation.

Step 2: Creating the Flow Simulation Study
Once you have prepared your geometry, it’s time to create a new Flow Simulation study. To do this, go to the ‘Flow Simulation’ tab in the SolidWorks Command Manager and click on ‘New Study.’ This will open up the Flow Simulation wizard.


Before proceeding with setting up your study, make sure you have defined appropriate material properties for your design. This includes specifying density, viscosity, thermal conductivity, and other relevant properties for fluids involved in your simulation.

Step 3: Setting up Boundaries and Initial Conditions
In this step, you need to define boundaries and initial conditions for your flow simulation. Boundaries include inlet and outlet conditions as well as any walls or symmetry planes present in your model.

  • Inlet: Specify the fluid properties at the inlet of your model, such as velocity, pressure, or mass flow rate. You can also define the fluid type if it is different from the default settings.
  • Outlet: Set the conditions at the outlet of your model, such as static pressure or backflow conditions.

    You can also specify whether the outlet is open to atmospheric conditions.

  • Walls: Define the wall conditions, such as no-slip or roughness, depending on your design requirements. You can also assign specific thermal properties if heat transfer is involved.
  • Symmetry Planes: If your model exhibits symmetry, you can define symmetry planes to reduce computational resources and improve simulation efficiency.

Step 4: Configuring Analysis Options
Before running the flow simulation, it’s essential to configure the analysis options according to your requirements. This includes specifying the solver type (such as laminar or turbulent), convergence criteria for solution accuracy, and other advanced settings like mesh refinement.

Tip: If you are unsure about which solver type to choose, start with a laminar analysis and gradually switch to a turbulent analysis if necessary.

Step 5: Meshing
Meshing plays a crucial role in obtaining accurate results from flow simulations. SolidWorks Flow Simulation provides an automated meshing feature that generates a suitable mesh based on your geometry and analysis requirements.

However, for complex models or critical simulations, it may be necessary to manually adjust the mesh settings. You can control parameters like element size, growth rate, curvature sensitivity, and more to ensure an optimal mesh for accurate results.

Step 6: Running the Flow Simulation
Once you have set up all the necessary parameters and configured your analysis options, it’s time to run the flow simulation. Click on the ‘Run Calculation’ button in the Flow Simulation tab, and SolidWorks will start solving the fluid flow equations based on the defined conditions.

During the calculation process, you can monitor the progress and check for any convergence issues or warnings that may require adjustments to your setup.

Step 7: Analyzing Results
After the flow simulation has completed, it’s time to analyze and interpret the results. SolidWorks Flow Simulation provides various tools for visualizing data, including velocity vectors, pressure contours, temperature distribution, and more.

You can generate plots, cut sections through your model, or animate flow animations to gain insights into how fluids behave within your design. These visualizations can help identify areas of high pressure drop, regions of low velocity, or heat transfer characteristics.

Step 8: Iterative Optimization
Flow simulations often lead to design improvements by identifying areas of inefficiency or suboptimal performance. Based on the results obtained from the analysis, you can make iterative changes to your geometry or boundary conditions and run additional simulations to validate their impact.

By repeating this process of simulation and optimization iteratively, you can fine-tune your design for better fluid flow characteristics and achieve improved performance.


Running a flow simulation in SolidWorks provides engineers with a powerful toolset to analyze fluid behavior within their designs. By following these steps – setting up geometry, creating a study, defining boundaries and initial conditions, configuring analysis options, meshing the model, running calculations, analyzing results, and iterating through optimizations – engineers can gain valuable insights into fluid flow patterns and optimize their designs for improved performance.