Topology optimization for fluid–structure interaction problems considering heat transfer performance

• A new topology optimization model of fluid–structure interaction problem is proposed. • A multi-objective optimization function involving structural deformation and heat transfer performance is established. • Different optimization designs are presented by considering various inlet pressures and different weight coefficients. • Evolutionary fluid-solid material interface is accurately tracked with dynamic grid-based model. • 2D/3D optimized impingement cooling structures are obtained and verified. Effectively controlling the deformation and temperature of heated structures is crucial for achieving high-performance active cooling through fluid flow. In this study, the topology optimization design of structures considering fluid–structure interactions and heat transfer performance was investigated, and then optimized designs of two-dimensional/three-dimensional cooling impingement systems obtained using the proposed method were obtained. In the optimization model, the objective function was constructed as a weighted combination of the mechanical deformations at specific locations and the average temperature within the designated solid channel structures. Additionally, explicit functional interpolation models were introduced to establish connections between the thermal, fluid, and solid properties, along with the element densities. In the analysis model, the strongly coupled structural mechanical deformation and fluid velocity field were analyzed via a dynamic-grid-based finite element model with a Winslow elliptic smoother to automatically track the fluid–structure interface during the process of optimization. To solve the optimization problems, the globally convergent moving asymptotic optimizer method was used to adjust the design variables on the basis of the sensitivity analysis. A demonstration of the efficacy of the proposed algorithm is provided through the presentation of several optimization examples. Furthermore, two- and three-dimensional cooling impingement systems were designed with the proposed method.