Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Mechanisms of Heat Transfer II

Mechanisms of Heat Transfer II

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...

Mechanisms of Heat Transfer

Mechanisms of Heat Transfer

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...

Mechanisms of Heat Transfer I

Mechanisms of Heat Transfer I

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.

Mechanism of heat transfer

Mechanism of heat transfer

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...

Thermal expansion and Thermal stress: Problem Solving

Thermal expansion and Thermal stress: Problem Solving

San Francisco's Golden Gate Bridge is exposed to temperatures ranging from -15 °C to 40 °C. At its coldest, the main span of the bridge is 1275 m long. Assuming that the bridge is made entirely of steel, what is the change in its length between these temperatures?
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in temperature (ΔT) is 55...

Response Surface Methodology

Response Surface Methodology

Response Surface Methodology (RSM) is a collection of statistical and mathematical techniques used to develop, improve, and optimize processes. It is particularly valuable when many input variables or factors potentially influence a response variable.
The process of RSM involves several key steps:

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Understanding the association between pressure ulcers and sitting in adults: What does it mean for all of us?

Journal of tissue viability·2025

Same author

Insights into the spectrum of transtibial prosthetic socket design from expert clinicians and their digital records.

Frontiers in rehabilitation sciences·2024

Same author

Changes in Tissue Composition and Load Response After Transtibial Amputation Indicate Biomechanical Adaptation.

Annals of biomedical engineering·2021

Same author

A 3D registration methodology to evaluate the goodness of fit at the individual-respiratory mask interface.

Computer methods in biomechanics and biomedical engineering·2020

Same author

Evaluating the effects of sedentary behaviour on plantar skin health in people with diabetes.

Journal of tissue viability·2020

Same author

Risk factors for developing heel ulcers for bedridden patients: A finite element study.

Clinical biomechanics (Bristol, Avon)·2020

Search research articles

Related Experiment Video

Updated: Nov 4, 2025

A CO2 Concentration Gradient Facility for Testing CO2 Enrichment and Soil Effects on Grassland Ecosystem Function

A CO2 Concentration Gradient Facility for Testing CO2 Enrichment and Soil Effects on Grassland Ecosystem Function

Published on: November 21, 2015

A combined experimental and computational approach to evaluate microclimate control at the support surface interface.

J G M V Van Asten¹, M-T Fung¹, C W J Oomens¹

¹Department of Biomedical Engineering, Eindhoven University of Technology, the Netherlands.

Journal of Tissue Viability

|May 25, 2021

Summary

This study evaluated support surfaces for pressure ulcer prevention. A combined experimental and computational approach showed active airflow significantly improved microclimate control compared to passive systems.

Keywords:

Evaluation Finite element analysis Medical device Microclimate Physical model Pressure ulcer

More Related Videos

Experimental Methods for Investigation of Shape Memory Based Elastocaloric Cooling Processes and Model Validation

Experimental Methods for Investigation of Shape Memory Based Elastocaloric Cooling Processes and Model Validation

Published on: May 2, 2016

Author Spotlight: Optimization of Airflow Velocities in Battery Cooling Systems for Enhanced Thermal Performance and Reduced Energy Consumption

Author Spotlight: Optimization of Airflow Velocities in Battery Cooling Systems for Enhanced Thermal Performance and Reduced Energy Consumption

Published on: November 3, 2023

Related Experiment Videos

Last Updated: Nov 4, 2025

A CO2 Concentration Gradient Facility for Testing CO2 Enrichment and Soil Effects on Grassland Ecosystem Function

A CO2 Concentration Gradient Facility for Testing CO2 Enrichment and Soil Effects on Grassland Ecosystem Function

Published on: November 21, 2015

Experimental Methods for Investigation of Shape Memory Based Elastocaloric Cooling Processes and Model Validation

Experimental Methods for Investigation of Shape Memory Based Elastocaloric Cooling Processes and Model Validation

Published on: May 2, 2016

Author Spotlight: Optimization of Airflow Velocities in Battery Cooling Systems for Enhanced Thermal Performance and Reduced Energy Consumption

Author Spotlight: Optimization of Airflow Velocities in Battery Cooling Systems for Enhanced Thermal Performance and Reduced Energy Consumption

Published on: November 3, 2023

Area of Science:

Biomedical Engineering
Materials Science

Background:

Microclimate at the skin-support interface is crucial for preventing pressure ulcers.
Existing methods for evaluating support surface microclimate control are limited.

Purpose of the Study:

To develop and validate a combined experimental-computational approach for analyzing microclimate control systems.
To compare the performance of two support surface designs with and without active airflow.

Main Methods:

A modified physical model was used to simulate moisture conditions.
Experimental data was used to calibrate a finite element model based on mass transport principles.
Microclimate conditions were monitored for 24 hours under different support surface configurations.

Main Results:

Support surfaces without active airflow showed minimal impact on humidity (RH>75% for 24hr).
Active airflow systems demonstrated significant spatial and temporal changes in microclimate, reaching ambient conditions within 24 hours.
The computational model accurately reflected experimental findings regarding microclimate distribution and changes over time.

Conclusions:

The combined experimental-computational approach effectively differentiates microclimate control performance between support surface designs.
This methodology can aid in evaluating mattress designs for personalized pressure ulcer prevention solutions.