Turbulent flow of a suspension of rigid spherical particles in plane channels

• Suspensions of solid particles are frequently found in applications and environmental flows. Several studies concern the rheological properties of suspensions in laminar flows, but much less is known of turbulent suspensions. The present work fills this gap providing DNS data on dense suspensions of neutrally-buoyant rigid sphere in a turbulent channel flow at the bulk Reynolds number of Re = U0h/ν = 2800. We show that considering volume fractions Φ ≤ 0.1 the turbulent flow is similar to the unladen case with higher turbulence intensities. On the contrary, the flow behavior strongly changes at Φ = 0.2where the turbulence appears to be attenuated.

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Maskinteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering (hsv//eng)

Keyword

Channel flow

Laminar flow

Pipe flow

Reynolds number

Turbulence

Turbulent flow

Buoyant rigid sphere

Dense suspension

Environmental flow

Rheological property

Spherical particle

Turbulence intensity

Turbulent channel flows

Turbulent suspension

Suspensions (fluids)

Publication and Content Type

ref (subject category)

kon (subject category)