SOLIDWORKS – Conducting Flow Simulation through a Manifold

It is important to ensure that air flows through the manifolds (intake and exhaust manifolds) smoothly to optimize engine efficiency and performance.

Loss of momentum in air flowing into and out of the cylinders due to irregular manifold geometry can be disastrous and may even disrupt engine cycles. I will do a simple flow simulation of air through a manifold to demonstrate Solidworks’ capability of simulating such environments with ease.

Begin first by defining your manifold geometry.


From the model of the manifold you can tell that we have several inlets with one outlet. The three inlets are fed directly from the products of combustion in the cylinders.

We need to first enable Solidworks Flow Simulation add-in in the add-ins drop down menu.



Create lids for the four openings then proceed to run the flow simulation wizard.


The window shown when you run the wizard lets you choose the project name and create a study.


Make a choice of the unit system you would like to use.


Choose a preference of the fluid you would like to be used in the simulation.


Once you have defined your study, flow simulation sets up a fluid domain as shown.


You can then define your boundary conditions, at the inlet and at the outlets. Define an inlet mass flow rate of 3kg/s and set the outlet conditions to Environmental pressure.



Once you have defined your conditions you can proceed to run the study.

Flow simulation will prepare the model and base on the solving method you choose, it will begin the iterations to solve your model.

You can access the Simulation results from the results folder in the feature manager tree. Here you can create cut plots and flow trajectories.