CFD analysis of the performance of elbow-meter with high concentration coal ash slurries

Anubhav Rawat, S. N. Singh, V. Seshadri

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


Elbow meter is a simple flow measuring device and its characteristics for the flow of single-phase fluids are reasonably well understood and the functional dependence of elbow meter coefficient (Ck) on parameters like Reynolds Number, radius ratio, pipe roughness etc. Is well documented in literature. Elbow meters are also being used for solid liquid flow in many industries. The present study aims to establish the characteristics of an elbow meter for high concentration coal ash slurry pipelines using validated CFD. High concentration coal ash slurries are known to behave as homogeneous fluids exhibiting behavior as Bingham plastic fluids. The validated CFD methodology has been used to predict the values of Ck for the flow of Bingham plastic fluid and establish its dependence on radius ratio, Hedstrom Number and Bingham Reynolds Number. Further, for the flow of high concentration fly ash slurry flows, Ck for any given radius ratio is observed to be independent of Hedstrom Number (over the range investigated He ≤ 105). Further, in fully turbulent flows, beyond a critical Reynolds number (ReB ≥ 5.3 × 103), Ck remains constant and is dependent only on the radius ratio.

Original languageEnglish
Article number101724
JournalFlow Measurement and Instrumentation
StatePublished - 1 Apr 2020
Externally publishedYes


  • Bingham plastic fluid
  • CFD
  • Elbow-meter
  • High concentration coal ash slurry
  • Meter coefficient

ASJC Scopus subject areas

  • Modeling and Simulation
  • Instrumentation
  • Computer Science Applications
  • Electrical and Electronic Engineering


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