Work

Integral quantification and phase space analysis of heat transfer in a particle-laden shearless turbulent flow

Year: 2026

Type: article

Abstract: We present a discussion of the enthalpy transport at the interface between two homothermal regions in a particle-laden turbulent flow, in order to quantify the role of inertial particles and of fluid-particle thermal interaction. We use a phase-space analysis of particles in a reduced phase space, and a formulation of a moment of total enthalpy integral (MTEI) applied to data from direct numerical simulations (DNS) at a Taylor microscale Reynolds number equal to 56 in a thermally coupled two-way regime. This allows us to identify the main features of particle statistics and to measure the effects of particle inertia and turbulent convection of the heat transfer, providing a quantitative and interpretable evaluation of the process which does not require any hypothesis of self-similarity. We show how particles dominate the transport mechanisms, bridging enthalpy across eddy structures, in particular when their Stokes number approaches unity, making them accumulate across temperature fronts.

Source: Physical Review Fluids

DOI: 10.1103/l7cm-vszk

Authors: Hamid Reza Zandi Pour, Perry L. Johnson, Michele Iovieno

Institutions: Istituto Nazionale di Fisica Nucleare, Politecnico di Torino, University of Turin, University of California, Irvine

Language: English

Topic: Particle Dynamics in Fluid Flows

Subfield: Ocean Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Funders: European High Performance Computing Joint Undertaking, Politecnico di Torino, Partnership for Advanced Computing in Europe AISBL, Vedecká Grantová Agentúra MŠVVaŠ SR a SAV

Award: G2842280048