公开(公告)号：US20240242010A1

公开(公告)日：2024-07-18

申请号：US18563224

申请日：2022-06-09

Applicant: LEDAFLOW TECHNOLOGIES DA

Inventor： Jørn Kjølaas ,  Ivar Eskerud Smith ,  Jonathan Nees

IPC: G06F30/28 ,  G06F30/23 ,  G06F30/27 ,  G06F111/10 ,  G06F113/14

CPC classification number: G06F30/28 ,  G06F30/23 ,  G06F30/27 ,  G06F2111/10 ,  G06F2113/14

Abstract: This invention relates to a computer-implemented method for predicting fluid behaviour in pipeline-based transport systems for transport of multiphase flows involving slug flows which forces one-dimensional CFD models to predict a Taylor bubble velocity being equal to a predetermined Taylor bubble velocity known to be realistic. The enforcement of the 1D CFD model to arrive at the predetermined Taylor bubble velocity is obtained by introducing a force term in the momentum equation for the gas phase at and near the slug-tail top and which is proportional to the difference between the Taylor bubble velocity predicted by the CFD model and the predetermined Taylor bubble velocity. The invention further relates to an autonomous system applying the computer-implemented method.

公开(公告)号：US20230306167A1

公开(公告)日：2023-09-28

申请号：US18044478

申请日：2021-09-08

Applicant: LEDAFLOW TECHNOLOGIES DA

Inventor： Ernst A. Meese (DECEASED) ,  Alexandre Morin ,  Alexandre Boucher

IPC: G06F30/28

CPC classification number: G06F30/28 ,  G06F2111/10

Abstract: This invention relates to a computer-implemented method for predicting fluid behaviour in pipeline-based multiphase flows, wherein the method comprises applying a one-dimensional computational fluid dynamic applying a finite volume method in the solver and which estimates the mass flux out of the finite control volumes by i) applying a polynomial to spatially reconstruct the mass present in each finite control volume, ii) reconstructing the flow velocity as a function of the x-component of the flow velocity vector to determine a domain of dependence for each finite control volume representing the distance the fluid has travelled during a time step, and iii) sum the spatially reconstructed mass being present in the domain of dependence for each finite control volume and assume the summarised mass passes out of the respective finite control volume over the applied time step.

公开(公告)号：US20200372195A1

公开(公告)日：2020-11-26

申请号：US16881817

申请日：2020-05-22

Applicant: LEDAFLOW TECHNOLOGIES DA

Inventor： Jørn Kjølaas

IPC: G06F30/28 ,  G06F30/13

Abstract: The invention relates to a computer implemented method and tool for determining pressure-drop in multiphase pipeline flow where the effective surface roughness, keff, of liquid film coated sections of the inner pipeline wall is assumed to be equal to the maximum hydraulic roughness, ksmax. The maximum hydraulic roughness is further assumed to be proportional to a maximum stable droplet size, ddropletmax, i.e.: keff=ksmax=K·ddropletmax, where K is a correlation coefficient. The invention further relates to applying the computer implemented method for designing a pipeline-based fluid transport system for transport of multiphase fluids.

公开(公告)号：US10409929B2

公开(公告)日：2019-09-10

申请号：US14647068

申请日：2013-11-21

Applicant: Ledaflow Technologies DA

Inventor： Stein Tore Johansen

IPC: G06F17/50 ,  G06F17/16

Abstract: This invention relates to a method for one dimensional simulation of multiphase fluid flow in pipelines enabling determination of pressure drop, fluid volume fractions, and heat and mass transfer coefficients in multiphase pipeline flows, wherein the method comprises providing real world values of the superficial velocities of each of the continuous fluid phases, the pipe diameter, and the inclination angle of the pipeline relative to the horizontal plane, providing initial values describing the flow geometry of the multiphase flow, where the initial values at least comprises the axial pressure gradient and the positions of the large scale interfaces separating the continuous fluid phases, employing a one-dimensional numerical model based on Eulerian formulated transport equations of the multiphase flow in the pipeline, solving the numerical model with the set of input values from step a) and b) to determine the flow parameters of the multiphase flow, and displaying one or more of the determined flow parameters.

公开(公告)号：US20240220687A2

公开(公告)日：2024-07-04

申请号：US18044478

申请日：2021-09-08

Applicant: LEDAFLOW TECHNOLOGIES DA

Inventor： Ernst Meese (DECEASED) ,  Alexandre Morin ,  Alexandre Boucher

IPC: G06F30/28

CPC classification number: G06F30/28 ,  G06F2111/10

Abstract: This invention relates to a computer-implemented method for predicting fluid behaviour in pipeline-based multiphase flows, wherein the method comprises applying a one-dimensional computational fluid dynamic applying a finite volume method in the solver and which estimates the mass flux out of the finite control volumes by i) applying a polynomial to spatially reconstruct the mass present in each finite control volume, ii) reconstructing the flow velocity as a function of the x-component of the flow velocity vector to determine a domain of dependence for each finite control volume representing the distance the fluid has travelled during a time step, and iii) sum the spatially reconstructed mass being present in the domain of dependence for each finite control volume and assume the summarised mass passes out of the respective finite control volume over the applied time step.

公开(公告)号：US11709980B2

公开(公告)日：2023-07-25

申请号：US16881817

申请日：2020-05-22

Applicant: LEDAFLOW TECHNOLOGIES DA

Inventor： Jørn Kjølaas

IPC: G06F30/28 ,  G06F30/13 ,  G06F113/14 ,  G06F113/08 ,  G06F111/10

CPC classification number: G06F30/28 ,  G06F30/13 ,  G06F2111/10 ,  G06F2113/08 ,  G06F2113/14

Abstract: The invention relates to a computer implemented method and tool for determining pressure-drop in multiphase pipeline flow where the effective surface roughness, keff, of liquid film coated sections of the inner pipeline wall is assumed to be equal to the maximum hydraulic roughness, ksmax. The maximum hydraulic roughness is further assumed to be proportional to a maximum stable droplet size, ddropletmax, i.e.: keff=ksmax=K·ddropletmax, where K is a correlation coefficient. The invention further relates to applying the computer implemented method for designing a pipeline-based fluid transport system for transport of multiphase fluids.