Steady state or times averaged CFD simulations are more routinely solved owing to being less computationally demanding but certain projects require the prediction of the transient behaviour of gases and fluids.

In Transient Flow Analysis,  transient CFD simulations can be used to capture comprehensive data on time varying flow features or phenomena that can be difficult and expensive to record in physical testing owing to the small timescales and the corresponding sophisticated instrumentation required. Transient flow analysis performed by TriVista have covered a wide range of aerodynamic (or hydrodynamic for liquids) applications but typically had objectives such as:

  • Examining time varying component concentrations over an industrial process cycle to either ensure concentrations remain within criteria or confirm contaminant removal times.
  • Quantifying the performance of products with moving or variable geometry (e.g. positive displacement devices, products with stationary and rotating parts). For these analyses, a moving mesh analysis can also be required in the CFD model.
  • Visualisation of transient flow features for improved understanding. Animations can be readily generated from transient solutions to assist with greater understanding.
  • Evaluating temperature distribution variation and ‘hot spot’ peak temperatures in systems with time varying thermal loading conditions. For example, heaters operating in failure modes.
  • Quantifying pressure loss and flow distributions in systems with operational time varying flow. For example, in medical equipment patient respiration simulations.
  • Prediction of the oscillating mechanical loading on structures owing to flow induced vibrations or transient pressure fluctuations e.g. vortex shedding. The CFD simulations can also be fully coupled with an FE solver to evaluate the structural integrity and behaviour under transient load (FSI analysis) e.g. sloshing in a tank.
  • Positive displacement CFD analysis

TriVista Engineering is a leading provider of cost-effective CFD services to industry and our team routinely works with clients in providing realistic flow solutions of genuine commercial benefit. We have assisted clients across a wide range of fields such as: process plants, oil and gas, HVAC systems, marine, power generation, subsea systems, aerospace & defence, automotive, water treatment, nuclear, medical equipment and domestic appliances.

The market leading ANSYS CFD suite of software tools provides TriVista with a capability to tackle transient flow analyses with confidence.

If you would like to know more please feel free to call or email (contact details below). Our experienced engineers will be happy to advise you. Alternatively, you may prefer to use our simple enquiry form.