Short answer

Designers should consider the orientation and configuration of building openings to intentionally harness or mitigate wind speed amplification effects.

Field
Human Factors
Source
Atmosphere (2023)
Method
Numerical Simulation (Large Eddy Simulation)
Evidence
Strong effect

Strategic placement of openings in high-rise buildings, particularly in the direction of wind flow, can create a 'narrow tube effect' that significantly amplifies localized wind speeds. This human factors research insight is drawn from a 2023 study published in Atmosphere. Using Numerical simulation (large eddy simulation), researchers explored how this design variable affects real-world outcomes. The key design takeaway: Designers should consider the orientation and configuration of building openings to intentionally harness or mitigate wind speed amplification effects.

Study
Human FactorsRecentStrong effect

Building Openings Can Amplify Wind Speed by 20% Through Narrow Tube Effect

Strategic placement of openings in high-rise buildings, particularly in the direction of wind flow, can create a 'narrow tube effect' that significantly amplifies localized wind speeds.

Atmosphere · 2023

01

Key Findings

  • 01Openings in the X-direction (parallel to wind flow) can significantly increase wind speed due to the narrow tube effect.
  • 02Openings in the Y-direction (perpendicular to wind flow) have a less pronounced effect on wind speed amplification and can reduce wind pressure.
  • 03Wind speeds within openings are generally reduced due to shielding, but can be increased in X-direction openings.
  • 04X-direction openings are more effective at altering wind loads compared to Y-direction openings.
02

Application

Design takeaway

Designers should consider the orientation and configuration of building openings to intentionally harness or mitigate wind speed amplification effects.

How to apply

When designing for wind energy harvesting on buildings, explore the potential of 'narrow tube' configurations with openings oriented along prevailing wind directions. Conversely, for pedestrian comfort, avoid such configurations or incorporate features to dissipate amplified wind energy.

Project actions

  • 01Consider how the shape and placement of openings affect airflow.
  • 02Investigate the potential for using these effects for energy generation or to improve ventilation.
03

Method & Evidence

AimTo investigate the impact of building openings on wind speed amplification and pressure distribution around high-rise structures.
MethodNumerical Simulation (Large Eddy Simulation)
ProcedureSimulated wind flow around 3D square cylinders with varying opening configurations (X-direction, Y-direction, and both) using LES on the Fluent platform. Verified simulation parameters against wind tunnel experiments. Analyzed wind speed and pressure at monitoring points within openings and on the surface.
ContextHigh-rise building design, urban wind engineering, renewable energy integration.

Variables

IV["Presence and direction of building openings (X-direction, Y-direction, both, none)."]
DV["Wind speed amplification within openings and on building surfaces.","Wind pressure distribution on building surfaces."]
CV["Building geometry (square cylinder, 1:6 aspect ratio).","Incoming wind speed and turbulence characteristics.","Simulation method (LES)."]
04

Strengths & Limitations

Strengths

  • +Utilizes a robust simulation method (LES) for detailed flow analysis.
  • +Verification against wind tunnel experiments enhances the reliability of the simulation results.

Limitations

Real-world wind is complex and variable; simulations are simplifications. The study focused on specific shapes, so results might differ for irregular building forms.

Reliability & validity

The study's reliability is supported by the use of LES and verification against wind tunnel data. Validity is strong within the simulated parameters, but generalization to all building types requires further research.

Think critically

How might the 'narrow tube effect' be mitigated in urban areas to prevent uncomfortable or dangerous wind conditions for pedestrians, even if it's beneficial for energy generation?

05

Design Principles

"Geometric features can be strategically employed to manipulate localized fluid dynamics, such as wind speed and pressure."

Understanding how building geometry influences wind flow is crucial for optimizing urban environments. This phenomenon can be leveraged for micro-wind energy generation or, conversely, needs to be managed to prevent adverse effects on pedestrian comfort and structural integrity.

06

What This Means for Your Design

Putting holes in buildings can make the wind blow much faster in certain spots, especially if the holes line up with the wind's direction. This is like squeezing a hose – the water speeds up.

How to use in your project

  • 1.Use this research to justify design choices related to ventilation or energy generation in your design project.
  • 2.Cite this study when discussing the aerodynamic properties of your proposed building form.
07

Add to My Project

08

Quick Cite

Paragraph starter

This research highlights that the strategic placement of openings in high-rise buildings can significantly influence localized wind speeds through phenomena like the narrow tube effect. Specifically, openings oriented in the direction of prevailing winds can amplify wind speed, offering potential for integrated micro-wind energy generation, while openings perpendicular to the wind may have less impact or reduce pressure. This understanding is crucial for optimizing building designs for both energy efficiency and occupant comfort.

09

Source

Atmosphere

Numerical Simulation on Wind Speed Amplification of High-Rise Buildings with Openings

journal · 2023

View source

Questions About This Research

What does the research say about building openings can amplify wind speed by 20% through narrow tube effect?
Designers should consider the orientation and configuration of building openings to intentionally harness or mitigate wind speed amplification effects. Evidence: Atmosphere (2023).
Why does "Building Openings Can Amplify Wind Speed by 20% Through Narrow Tube Effect" matter for design?
Understanding how building geometry influences wind flow is crucial for optimizing urban environments. This phenomenon can be leveraged for micro-wind energy generation or, conversely, needs to be managed to prevent adverse effects on pedestrian comfort and structural integrity.
How can designers apply this research?
Designers should consider the orientation and configuration of building openings to intentionally harness or mitigate wind speed amplification effects.
What were the main findings?
Openings in the X-direction (parallel to wind flow) can significantly increase wind speed due to the narrow tube effect.. Openings in the Y-direction (perpendicular to wind flow) have a less pronounced effect on wind speed amplification and can reduce wind pressure.. Wind speeds within openings are generally reduced due to shielding, but can be increased in X-direction openings.. X-direction openings are more effective at altering wind loads compared to Y-direction openings.
What research method was used?
Numerical Simulation (Large Eddy Simulation).
How strong is the evidence?
Evidence strength is rated Strong effect, based on a 2023 journal from Atmosphere.
What should I do differently in my next project?
When designing for wind energy harvesting on buildings, explore the potential of 'narrow tube' configurations with openings oriented along prevailing wind directions. Conversely, for pedestrian comfort, avoid such configurations or incorporate features to dissipate amplified wind energy.
What are the limitations?
The study focused on specific square cylinder geometries and aspect ratios; results may vary for different building shapes and urban contexts. The simulation is a model and may not perfectly replicate real-world atmospheric conditions.