Related Experiment Video
Updated: Jan 23, 2026
10:29
Experimental Methodology for Estimation of Local Heat Fluxes and Burning Rates in Steady Laminar Boundary Layer Diffusion Flames
Published on: June 1, 2016
12.3K
Diffuse-interface immersed-boundary framework for conjugate-heat-transfer problems
Mukesh Kumar1, Ganesh Natarajan1
1Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Assam 781039, India.
Physical Review. E
|June 20, 2019
Summary
A new immersed-boundary (IB) solver simplifies conjugate heat transfer (CHT) simulations. This unified approach accurately models heat transfer in both fluid and solid domains for Boussinesq flows.
Area of Science:
- Computational Fluid Dynamics
- Heat Transfer
- Numerical Methods
Background:
- Conjugate heat transfer (CHT) problems require complex modeling of fluid-solid interactions.
- Existing methods often involve intricate boundary conditions or separate solvers for fluid and solid domains.
- A unified approach can simplify the simulation process and improve efficiency.
Purpose of the Study:
- To present a monolithic solver for CHT problems using a diffuse-interface immersed-boundary (IB) approach.
- To develop a unified framework that seamlessly handles both fluid and solid domains.
- To validate the solver's accuracy and efficiency for various CHT scenarios.
Main Methods:
- Developed a diffuse-interface immersed-boundary (IB) strategy with a "virtual" fluid in solid regions.
- Formulated unified momentum and energy equations using solid volume fraction.
- Employed a hybrid finite-volume (FV) framework for solving incompressible flows.
- Implemented a second-order accurate IB-FV solver for CHT simulations.
Main Results:
- The unified momentum equation correctly reduces to Navier-Stokes and no-slip conditions.
- The unified energy equation accurately represents convective-diffusive and diffusive behaviors.
- The solver demonstrated speed, simplicity, and accuracy in simulations.
- Performance was validated across natural and forced convective regimes for Boussinesq flows.
Conclusions:
- The monolithic IB-CHT solver offers a robust and efficient framework for CHT simulations.
- The diffuse-interface IB approach effectively unifies fluid and solid domain modeling.
- The solver is suitable for various CHT problems, particularly those involving Boussinesq flows.
More Related Videos
Related Concept Videos
01:14Mechanisms of Heat Transfer I
6.0K
Just as interesting as the effects of heat transfer on a system are the methods by which the heat transfer occur. Whenever there is a temperature difference, heat transfer occurs. It may occur rapidly, such as through a cooking pan, or slowly, such as through the walls of a picnic ice box. So many processes involve heat transfer that it is hard to imagine a situation where no heat transfer occurs. Yet, every heat transfer takes place by only three methods: conduction, convection, and radiation.
6.0K
01:20Mechanisms of Heat Transfer II
4.3K
In convection, thermal energy is carried by the large-scale flow of matter. Ocean currents and large-scale atmospheric circulation, which result from the buoyancy of warm air and water, transfer hot air from the tropics toward the poles and cold air from the poles toward the tropics. The Earth’s rotation interacts with those flows, causing the observed eastward flow of air in the temperate zones. Convection dominates heat transfer by air, and the amount of available space for the airflow...
4.3K
01:19Mechanism of heat transfer
1.9K
Understanding heat transfer mechanisms is essential for understanding how our bodies maintain balance in different environmental conditions. When the environment is thermoneutral, the body is in a state of balance, neither using nor releasing energy to maintain its core temperature. However, when the environment is not thermoneutral, the body employs four heat transfer mechanisms to maintain homeostasis: conduction, convection, evaporation, and radiation. These mechanisms facilitate heat...
1.9K
01:14Mechanisms of Heat Transfer
1.6K
Heat transfer between the human body and its environment occurs through four main mechanisms: conduction, convection, radiation, and evaporation.
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant...
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant...
1.6K
01:12Diffusion
216.9K
Diffusion is the passive movement of substances down their concentration gradients—requiring no expenditure of cellular energy. Substances, such as molecules or ions, diffuse from an area of high concentration to an area of low concentration in the cytosol or across membranes. Eventually, the concentration will even out, with the substance moving randomly but causing no net change in concentration. Such a state is called dynamic equilibrium, which is essential for maintaining overall...
216.9K
02:50Conjugated Proteins
27.5K
Simple proteins and protein complexes contain only amino acids. In contrast, many other proteins, called conjugated proteins, covalently bond with non-protein moieties.
Nucleoproteins are protein complexes that contain nucleic acids, categorized as deoxyribonucleoproteins (DNPs) or ribonucleoproteins (RNPs) respectively. The nucleosome is a typical example of a DNP where nuclear DNA is associated with histone proteins. The major antigen for the Covid-19 virus SARS-CoV is an RNP that is critical...
Nucleoproteins are protein complexes that contain nucleic acids, categorized as deoxyribonucleoproteins (DNPs) or ribonucleoproteins (RNPs) respectively. The nucleosome is a typical example of a DNP where nuclear DNA is associated with histone proteins. The major antigen for the Covid-19 virus SARS-CoV is an RNP that is critical...
27.5K