Enhancing Heat Exchanger Reliability through Flow-Induced Vibration Analysis

Подробнее о видео

At Dynaflow, we have conducted in-depth analyses of tube rupture in heat exchangers, in this case focusing on fluid-structure interaction (FSI) phenomena. Our simulations capture critical aspects such as vortex formation, vortex shedding, velocity profiles, pressure distributions, and the forces exerted on the tubes. These dynamic forces can induce vibrations that lead to significant displacements and, over time, fatigue failures—especially at the welds.

Simulation 1: Single Row Analysis – Vortex Shedding & Dynamic Forces
In our first analysis, we focused on a single row of tubes to closely examine the fluid dynamics at play. The animation demonstrates vortex shedding, allowing us to quantify the frequency of vortex formation, as well as to capture velocity profiles, pressure distributions, and the resulting forces on the tubes. This targeted study helps us understand the fundamental dynamic interactions that can lead to fatigue issues over time.
Animation Note: The video clearly visualizes how a single row of tubes interacts with the flow, highlighting the formation and shedding of vortices.

Simulation 2: Multiple Rows Analysis – System-Level Insights
Expanding our scope, the second analysis considers multiple rows of tubes to investigate how inter-row interactions affect the overall system behavior. By comparing these results with our single row analysis, we can observe differences in flow patterns and force distributions when the complete configuration is taken into account. This broader perspective is essential for optimizing design and ensuring robust performance in real-world applications.
Animation Note: The animation shows a multi-row arrangement, offering a comprehensive view of how fluid dynamics change across the entire system.

Simulation 3: Incorporating Tube Stiffness – Advanced FSI with Moving Meshes
In our most advanced analysis, we incorporate an approximate of the stiffness of the tubes to simulate a nearly complete fluid-structure interaction (FSI) scenario. Utilizing moving mesh techniques in a 2D framework, this simulation captures the dynamic response of the tubes under realistic operating conditions. The approach enables us to assess the impact of tube flexibility on the interaction between fluid forces and structural integrity, offering deeper insights into potential fatigue mechanisms.

Animation Note: The animation employs moving meshes to vividly illustrate the coupled behavior of fluid flow and tube deformation, in a 2D FSI simulations.

Read full project here:

Check out our services:
For more information and projects, follow us on our website and social media channels:

LinkedIn:
LinkedIn Newsletter:
Website: