Questions tagged [building-physics]
The physics of buildings, specifically thermal conduction, convection, & radiation; heating and cooling; ventilation; transmission and management of water vapour & pollutants
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Average weight for 100 feet tall steel tower
Usually, how much steel is used when used to construct a 100 feet tall steel tower like this? For example, in the picture below the 100 feet tall steel tower was used to support a 4 to 5 tonne load on ...
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How to direct heat via radiation without converting to electricity?
I’m trying to build is a solid thermal storage facility for cold regions, where ambient temperatures can drop to −20 °C. The idea is to store heat at high temperatures (about 400–1000 °C) so it can be ...
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Surveys of empirical overall heat transfer coefficient for houses
I am looking for a survey of empirical heat transfer coefficients for typical houses in the United States. I do understand that heat transfer coefficients can be calculated by various means for ...
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For a massive hydrobattery building, what scales could be feasible at all?
Say 0.5-7 million cubic metres of a liquid 2.5x denser than water. What types of shapes, heights, materials could even be explored for a hydrobattery building of this scale?
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How to build apartment floors/ceilings to not transfer sound?
How do new apartment buildings build their floors/ceilings to prevent the transfer of sound between people living above/below each other?
Note: I'm not asking about how to soundproof an existing ...
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How does a church built from stones survive 70 years under water?
Following the recent news about the Sau reservoir in Spain, the draught revealed an 11-century stone church which has been under water for 70 years since 1962 when the reservoir was built.
How is it ...
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How did gothic church architects/builders properly scale up their models to full size churches?
In this video the author explains how ancient church builders used models to determine the proper shape and order of installation of architectural elements in gothic churches.
From the little I know, ...
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How to make a galilean cannon with balls falling/rebounding straight
Here is what I mean by galilean cannon, simply letting balls fall, but hard to experiment though... First, I tried to drop 2 balls with my hands, but balls do not rebound straight and I get enormous ...
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Can a buckling steel column fracture on multiple points?
When a column buckles, then yields, and finally fractures fractures, along the most stressed point, this will initially reduce the axial and bending strains along other points. The apparent conclusion ...
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Doubt about Reynolds number formula
In fluid dynamics, when I have to compute Reynolds number, I was taught to differentiate between two cases: $$ 1)\space \frac{\rho\cdot v\cdot d}{\mu}$$ or $$2)\space \frac{v\cdot d}{\mu}$$
but, why ...
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Advice needed on how to cool 50 ml liquid from 60 °C to 30 °C
In Short: I'm working on a project where we need to cool 50 ml of liquid from 60 °C to 30 °C or 20 °C. The liquid will be in a 150 ml copper container with an open top.
Due to the lack of skills in ...
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What design could fit this egg drop challenge?
My class is doing the egg drop challenge as a school project, but the rules are a little different than normal. First of all, the construction needs to contain a microbit connected to a battery pack ...
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what speed must a bullet be fired at to turn into gas when hitting a steal plate
what speed must a bullet be fired at to turn into gas when hitting a steel plate.
from watching this video on 9gag, i see that the bullet almost turns into liquid, what speed would it need to hit it ...
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Would pyramid shape buildings prevent people from falling to their deaths? [closed]
If a building the shape of pyramids slops downwards, wouldn't it minimize the risk of fall from heights, whether intentionally or by accident (like fire/bomb scare), from a balcony or window opening? ...
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Who takes care of structural health monitoring of civil structures?
There are numerous studies about the possibility of structural health monitoring (SHM) of tall structures, like bridges, skyscrapers, water towers, wind turbines, where, for example, inclination or ...
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Tensile Force on Line of Bolts
I'm presented with a problem requiring some analysis to determine if an antenna bracket mounted to a concrete blockwork wall is sufficiently strong enough to endure a wind load given the known surface ...
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What would happen if the air conditioning failed in a skyscraper for an extended period?
I'm writing some fiction which involves the AC in a modern glass curtain skyscraper (50-80 floors?) in an American city failing for a period of weeks, maybe even for up to two months.
Could anybody ...
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Investigating the potential of generating energy from moving water in pipes on a water production site
I work on a water production site, we have a staggering amount of water flowing, much of which is just using gravity pressure and feeding into reservoir tanks. (flow on various sites ranges from 100 ...
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Why did they move ancient Egyptian temples to prevent them from water damage instead of encircling them with a dam?
Specifically I'm talking about Abu Simbel temple and Philae temple. Which are close to a reservoir created by Aswan dam.
It seems to me easier to build a dam than to move a temple.
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Could Tesla have REALLY shaken a building with a little oscillator?
I came across this story while reading about Nikola Tesla ground-power scheme. Supposedly, he created a little oscillator that could be plugged into the ground, tuned to the right (resonant) frequency,...
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Sun light illumination on a lower floor vs high building closely
there is an investor that wants to build very close to our building. In case we agree, the buildings will stand like on the pictures below, 3 meters apart from each other. I tried to draw them in ...
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What does Leonardo da Vinci mean in his statement on arches?
I was recently reading some of Leonardo da Vinci's notes on architecture. One passage on arches states:
An Experiment to show that a weight placed on an arch does not
discharge itself entirely on ...
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Increase in target emission rate (TER) when using a air source heat pump (ASHP) in standard assessment procedure (SAP) calculation
I am running a SAP calculation on a proposed building which will be utilising a 8.5 kW ASHP for space and water heating. I am also running a comparative analysis against a mains gas boiler to show the ...
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What is the minimum height of a chimney needed in a camper?
Like a lot of people nowadays, I'm fitting a log fire into the back of a camper van but can't find the minimum height above the roof for the chimney. Ideally, it should be as low as possible for ...
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How deep do you have to check for problems underneath a building site?
When you're putting up a new building, you have to check the soil underneath for stability. How deep do you typically have to check? What's the extent of your "due diligence" when ensuring that a ...
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