/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 84 Describe the pressure distributi... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 6: Problem 84

Describe the pressure distribution on the exterior of a multistory building in a steady wind. Identify the locations of the maximum and minimum pressures on the outside of the building. Discuss the effect of these pressures on infiltration of outside air into the building.

Short Answer

Expert verified
In a steady wind, a building experiences varying pressure across its surface. The highest is on the windward side and around corners and roof edges, while the lowest is on the leeward side and in sheltered areas. These pressures affect air infiltration into the building, with the windward side experiencing more infiltration due to higher pressure driving air in. Efficient insulation and sealing are necessary for high-pressure areas to control infiltration, affecting energy consumption and occupant comfort.

Step by step solution

01

Understand the Basics of Fluid Dynamics

Recall that wind can be modelled as a flow of fluid, in this case, air is the fluid. The wind produces different pressures on a building based on its speed and direction, as well as the building's design. Pressure is usually highest on the side facing the wind (windward side) and lowest on the opposite side (leeward side). Around corners and roof edges, wind speed can increase causing localized high pressure.
02

Identify the Points of Maximum and Minimum Pressure

The maximum pressure points are usually located on the windward side and localized at corners and roof edges. The minimum pressure points, however, are generally positioned on the leeward side and other areas sheltered from the direct wind flow like recessed windows or entrances.
03

Discuss the Effect of Pressure on Air Infiltration

Air infiltration in a building is largely influenced by the differential pressures indoors and outdoors. High pressure on the windward side pushes air into the building through any available openings while the low pressure on the leeward side pulls air out. This implies more air will be infiltrated in the areas with the highest pressure and hence, more attention should be given to the insulation and sealing of such areas. This infiltration can affect the building's indoor air quality, energy consumption for heating or cooling, and occupant comfort.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Consider the flow field with velocity given by \(\vec{V}=\) \(A x \sin (2 \pi \omega t) \hat{i}-A y \sin (2 \pi \omega t) \hat{j},\) where \(A=2 \mathrm{s}^{-1}\) and \(\omega=1 \mathrm{s}^{-1}\) The fluid density is \(2 \mathrm{kg} / \mathrm{m}^{3}\). Find expressions for the local acceleration, the convective acceleration, and the total acceleration. Evaluate these at point (1,1) at \(t=0,0.5,\) and 1 seconds. Evaluate \(\nabla p\) at the same point and times.

A mercury barometer is carried in a car on a day when there is no wind. The temperature is \(20^{\circ} \mathrm{C}\) and the corrected barometer height is \(761 \mathrm{mm}\) of mercury. One window is open slightly as the car travels at \(105 \mathrm{km} / \mathrm{hr}\). The barometer reading in the moving car is \(5 \mathrm{mm}\) lower than when the car is stationary. Explain what is happening. Calculate the local speed of the air flowing past the window, relative to the automobile.

The flow field for a plane source at a distance \(h\) above an infinite wall aligned along the \(x\) axis is given by \\[ \begin{aligned} \vec{V} &=\frac{q}{2 \pi\left[x^{2}+(y-h)^{2}\right]}[x \hat{i}+(y-h) \hat{j}] \\\ &+\frac{q}{2 \pi\left[x^{2}+(y+h)^{2}\right]}[x \hat{i}+(y+h) \hat{j}] \end{aligned} \\] where \(q\) is the strength of the source. The flow is irrotational and incompressible. Derive the stream function and velocity potential. By choosing suitable values for \(q\) and \(h,\) plot the streamlines and lines of constant velocity potential.

The stream function of a flow field is $ \psi=A x^{3}-B x y^{2}, \text { where } A=1 \mathrm{m}^{-1} \cdot \mathrm{s}^{-1} \text {and } B=3 \mathrm{m}^{-1} \cdot \mathrm{s}^{-1} $ and coordinates are measured in meters. Find an expression for the velocity potential.

Determine whether the Bernoulli equation can be applied between different radii for the vortex flow fields (a) \(\vec{V}=\omega r \hat{e}_{\theta}\) and (b) \(\vec{V}=\hat{e}_{\theta} K / 2 \pi r\)
See all solutions

Recommended explanations on Physics Textbooks

Dynamics

Read Explanation

Classical Mechanics

Read Explanation

Physical Quantities And Units

Read Explanation

Particle Model of Matter

Read Explanation

Translational Dynamics

Read Explanation

Energy Physics

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.