Experiments

This research area focuses on the physical validation of fluid dynamic phenomena and the thermal characterisation of engineering systems through rigorous diagnostic techniques. We utilise a range of specialised experimental setups, including custom-designed wind tunnels, to investigate boundary layer development and aerodynamic forces. Heat transfer characteristics and surface efficiencies are precisely determined using the single blow method, which allows for the transient estimation of heat transfer coefficients in complex matrix geometries. Our laboratory is integrated with high-precision instrumentation, including pressure sensors for capturing lift/drag distributions and temperature sensors (such as thermocouples and RTDs) for real-time thermal mapping. By combining these hardware-in-the-loop experiments, we provide essential empirical data to calibrate our computational models and optimise thermal-fluid systems.

1. Experiments in Wind-Tunnel

The experimental setup is used to evaluate the drag characteristics and pressure drop across complex flow structures and porous test samples placed inside the wind tunnel test section. Air is driven through the tunnel using a controlled fan system, creating a steady airflow over the test specimen. The pressure difference across the sample is measured using differential pressure sensors connected upstream and downstream of the test section. The measured pressure drop is used to estimate the flow resistance and drag generated by the internal geometry of the test sample. These measurements provide valuable insight into the aerodynamic performance, permeability, and hydraulic characteristics of compact heat exchanger structures and additively manufactured porous media. Such analysis is essential for optimising the design of thermal management systems, energy devices, and high-performance heat exchangers, where minimizing pressure losses while maintaining effective heat transfer is critical.

1. Heat transfer estimation

The Single Blow Method is a transient experimental technique used to determine the convective heat transfer coefficient and thermal performance of porous media, heat exchangers, and compact heat transfer surfaces. In this method, a fluid at a different temperature is suddenly introduced into a test section containing the sample material. The inlet temperature changes step-wise, and the resulting outlet temperature response is recorded as a function of time.

By analyzing the transient temperature history at the outlet, the heat transfer characteristics of the test matrix can be evaluated. The method is widely used because it requires short experimental time, simple instrumentation, and minimal steady-state requirements. It is particularly useful for studying compact heat exchangers, porous structures, and additively manufactured thermal components in thermo-fluid systems.

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