# Spatio-temporal Characterization of Thermal Fluctuations in a Non-turbulent Rayleigh-B\'enard Convection at Steady State

## TL;DR

This paper details statistical and computational methods used to analyze thermal fluctuations in a non-turbulent Rayleigh-Bénard convection system at steady state, addressing key open questions in out-of-equilibrium physics.

## Contribution

It provides a comprehensive technical framework for studying far-from-equilibrium steady states and the emergence of stable structures in Rayleigh-Bénard convection.

## Key findings

- Characterization of thermal fluctuations in non-turbulent regime
- Insights into differences between equilibrium and out-of-equilibrium states
- Methodological foundation for future studies of far-from-equilibrium systems

## Abstract

In this paper we present a detailed description of the statistical and computational techniques that were employed to study a driven far-from-equilibrium steady-state Rayleigh-B{\'e}nard system in the non-turbulent regime ($Ra\leq 3500$). In our previous work on the Rayleigh-B{\'e}nard convection system we try to answer two key open problems that are of great interest in contemporary physics: (i) how does an out-of-equilibrium steady-state differ from an equilibrium state and (ii) how do we explain the spontaneous emergence of stable structures and simultaneously interpret the physical notion of temperature when out-of-equilibrium. We believe that this paper will offer a useful repository of the technical details for a first principles study of similar kind. In addition, we are also hopeful that our work will spur considerable interest in the community which will lead to the development of more sophisticated and novel techniques to study far-from-equilibrium behavior.