Default Digital Object Group,
Год журнала:
2022,
Номер
unknown
Опубликована: Янв. 24, 2022
Respiratory
droplets—which
may
contain
disease
spreading
virus—exhaled
during
speaking,
coughing,
or
sneezing
are
one
of
the
significant
causes
for
spread
ongoing
COVID-19
pandemic.
The
droplet
dispersion
depends
on
surrounding
air
velocity,
ambient
temperature,
and
relative
humidity.
In
a
confined
space
like
an
elevator,
risk
transmission
becomes
higher
when
there
is
infected
person
inside
elevator
with
other
individuals.
this
work,
numerical
investigation
carried
out
in
three-dimensional
domain
resembling
using
OpenFoam.
Three
different
modes
ventilation,
viz.,
quiescent,
axial
exhaust
draft,
fan,
have
been
considered
to
investigate
effect
ventilation
two
climatic
conditions
(30
°C,
50%
humidity
10
90%
humidity).
assessment
quantified
factor
based
time-averaged
count
present
near
passenger's
hand
head
region
(risky
height
zone).
drops
from
40%
quiescent
scenario
0%
fan
condition
hot
dry
environment.
general,
cold
humid
safer
than
as
droplets
settle
down
quickly
below
risky
zone
owing
their
larger
masses
maintained
by
negligible
evaporation.
However,
renders
ambience
completely
safe
(risk
factor,
0%)
5.5
s
whereas
it
takes
7.48
ambience.
Respiratory
droplets-which
may
contain
disease
spreading
virus-exhaled
during
speaking,
coughing,
or
sneezing
are
one
of
the
significant
causes
for
spread
ongoing
COVID-19
pandemic.
The
droplet
dispersion
depends
on
surrounding
air
velocity,
ambient
temperature,
and
relative
humidity.
In
a
confined
space
like
an
elevator,
risk
transmission
becomes
higher
when
there
is
infected
person
inside
elevator
with
other
individuals.
this
work,
numerical
investigation
carried
out
in
three-dimensional
domain
resembling
using
OpenFoam.
Three
different
modes
ventilation,
viz.,
quiescent,
axial
exhaust
draft,
fan,
have
been
considered
to
investigate
effect
ventilation
two
climatic
conditions
(30
°C
,
50%
humidity
10
90%
humidity).
assessment
quantified
factor
based
time-averaged
count
present
near
passenger's
hand
head
region
(risky
height
zone).
drops
from
40%
quiescent
scenario
0%
fan
condition
hot
dry
environment.
general,
cold
humid
safer
than
as
droplets
settle
down
quickly
below
risky
zone
owing
their
larger
masses
maintained
by
negligible
evaporation.
However,
renders
ambience
completely
safe
(risk
factor,
0%)
5.5
s
whereas
it
takes
7.48
ambience.
Pathogens,
Год журнала:
2023,
Номер
12(3), С. 382 - 382
Опубликована: Фев. 27, 2023
The
COVID-19
pandemic
due
to
the
Severe
Acute
Respiratory
Syndrome
Coronavirus
2
(SARS-CoV-2)
has
been
plaguing
world
since
late
2019/early
2020
and
changed
way
we
function
as
a
society,
halting
both
economic
social
activities
worldwide.
Classrooms,
offices,
restaurants,
public
transport,
other
enclosed
spaces
that
typically
gather
large
groups
of
people
indoors,
are
considered
focal
points
for
spread
virus.
For
society
be
able
go
“back
normal”,
it
is
crucial
keep
these
places
open
functioning.
An
understanding
transmission
modes
occurring
in
contexts
essential
set
up
effective
infection
control
strategies.
This
was
made
using
systematic
review,
according
Preferred
Reporting
Items
Systematic
reviews
Meta-Analyses
statement
(PRISMA)
guidelines.
We
analyze
different
parameters
influencing
airborne
mathematical
models
proposed
understand
it,
discuss
how
can
act
on
parameters.
Methods
judge
risks
through
analysis
indoor
air
quality
described.
Various
mitigation
measures
listed,
their
efficiency,
feasibility,
acceptability
ranked
by
panel
experts
field.
Thus,
ventilation
procedures
controlled
CO2-monitoring,
continued
mask
wearing,
strategic
room
occupancy,
among
measures,
put
forth
enable
safe
return
places.
Environmental Science & Technology,
Год журнала:
2024,
Номер
58(15), С. 6532 - 6539
Опубликована: Март 27, 2024
Sweating
regulates
the
body
temperature
in
extreme
environments
or
during
exercise.
Here,
we
investigate
evaporative
heat
transfer
of
a
sweat
droplet
at
microscale
to
unveil
how
evaporation
complexity
would
affect
body's
ability
cool
under
specific
environmental
conditions.
Our
findings
reveal
that,
depending
on
relative
humidity
and
levels,
droplets
experience
imperfect
dynamics,
whereas
water
evaporate
perfectly
equivalent
ambient
At
low
humidity,
fully
evaporates
leaves
solid
deposit,
while
high
never
reaches
deposit
maintains
liquid
phase
residue
for
both
temperatures.
This
unprecedented
mechanism
is
attributed
intricate
physicochemical
properties
as
biofluid.
We
suppose
that
deposited
surface
by
continuously
absorbing
surrounding
moisture.
route
leads
reduced
transfer,
increased
index,
potential
impairment
thermoregulation
capacity.
The
insights
into
dynamics
help
us
improve
knowledge
natural
cooling
with
practical
applications
healthcare,
materials
science,
sports
science.
International Journal of Hygiene and Environmental Health,
Год журнала:
2023,
Номер
256, С. 114313 - 114313
Опубликована: Дек. 27, 2023
Recent
epidemiological
and
experimental
findings
reconfirm
that
low
indoor
air
humidity
(dry
air)
increases
the
prevalence
of
acute
eye
airway
symptoms
in
offices,
result
lower
mucociliary
clearance
airways,
less
efficient
immune
defense,
deteriorate
work
productivity.
New
research
also
support
environmental
conditions
for
risk
infection
influenza
COVID-19
virus
is
lowest
Goldilocks
zone
40–60%
relative
(RH)
by
decrease
airways'
susceptibility,
which
can
be
elevated
particle
exposure.
Furthermore,
RH
generation
infectious
laden
aerosols
exhaled
from
infected
people.
In
general,
elevation
dry
health
airways
concomitantly
with
viability
virus.
Thus,
negative
effects
ventilation
outdoor
(low
absolute
humidity)
should
assessed
according
to
1)
weakened
functionality
2)
increased
possible
transmissibility
virus,
3)
evaporation
containing
droplets
out
droplet
nuclei
(also
at
high
room
temperature),
their
floating
time
air.
The
removal
acid-containing
ambient
filtration
pH,
viruses,
infection,
synergistically
may
further
increase
dilution
pollutants
compared
beneficial
control
center
RH,
an
essential
factor
optimal
additional
positive
impact
on
symptoms,
productivity,
reduced
infection.
Eco-Environment & Health,
Год журнала:
2022,
Номер
1(2), С. 73 - 85
Опубликована: Июнь 1, 2022
Since
December
2019,
the
2019
coronavirus
disease
(COVID-19)
outbreak
has
become
a
global
pandemic.
Understanding
role
of
environmental
conditions
is
important
in
impeding
spread
COVID-19.
Given
that
airborne
and
contact
transmission
are
considered
main
pathways
for
COVID-19,
this
narrative
review
first
summarized
temperature
humidity
trajectory
severe
acute
respiratory
syndrome
2
(SARS-CoV-2).
Meanwhile,
we
reviewed
persistence
virus
aerosols
on
inert
surfaces
how
SARS-CoV-2
affected
by
humidity.
We
also
examined
existing
epidemiological
evidence
addressed
limitations
these
studies.
Although
uncertainty
remains,
more
may
support
idea
high
slightly
negatively
associated
with
COVID-19
growth,
while
conclusion
still
conflicting.
Nonetheless,
appears
to
have
been
controlled
primarily
government
interventions
rather
than
factors.
