Effects of a reacting channel wall on turbulent mass transfer

Nguyen, Kien T.; Papavassiliou, Dimitrios V.

doi:10.1016/j.ijheatmasstransfer.2007.09.028

Cited by 9 publications

(2 citation statements)

References 34 publications

(56 reference statements)

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“…Lagrangian scalar tracking has been used in conjunction with chemical reactions in the past. The effects of a first-order chemical reaction on turbulent mass transfer from a wall [26] and to the wall [27] have been investigated using LST. Flow effects on the kinetics of an isothermal, equimolar, second-order reaction taking place in a channel have been also investigated using LST.…”

Section: Reactive Lagrangian Scalar Tracking Algorithmmentioning

confidence: 99%

“…In order to take into account the time the solute particles take to reach the wall as they travel through the flow field, the LST results can be expressed in terms of effective first‐order reaction kinetics by fitting LST results to Equations (9) and (10), where the concentration is assumed to be proportional to the number of walkers into the domain (see also 26, 27, 29 for obtaining the concentration field in other configurations). The effective half‐lives and effective first‐order reaction rate constants are plotted in Figures 11 and 12, respectively, for several salt‐leached scaffolds typically used in bone tissue engineering (porosity between 80 and 95%, and an average pore size between 180 and 450 microns).…”

Section: A Case Study: Simulation Of Transport In Flow Through Pormentioning

confidence: 99%

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Efficient Lagrangian scalar tracking method for reactive local mass transport simulation through porous media

Voronov

VanGordon

Sikavitsas

et al. 2011

Numerical Methods in Fluids

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SUMMARYMass transfer in the presence of chemical reactions for flows through porous media is of interest to many disciplines. The Lattice Boltzmann method (LBM) is particularly attractive in such cases due to the ease with which it handles complicated boundary conditions. However, useful Lagrangian information (such as solute survival distance, effective diffusivity, collision frequency) is challenging to obtain from the LBM. In this paper, we present a straightforward and efficient Lagrangian methodology (Lagrangian scalar tracking, LST) for performing solute transport simulations in the presence of heterogeneous, first-order, irreversible reactions, based on a velocity field obtained from LBM. The hybrid LST/LBM technique tracks passive mass markers that have two contributions to their movement: convective (obtained through interpolation of a previously obtained velocity field) and Brownian. Various Schmidt number solutes and different solute release modes can be modeled with a single solvent flow field using this method. Moreover, the mass markers can have a range of reaction rate coefficients. This allows for the exploration of the whole spectrum of first-order heterogeneous reaction rates with just a single simulation. In order to show the applicability of the LST/LBM scheme, results from a case study are presented in which the consumption of oxygen and/or nutrients within a porous bone tissue engineering scaffold is modeled under flow perfusion culturing conditions. Although the reactive LST methodology described in this paper compliments the LBM, it can also be used with any other flow simulation that can generate the velocity field.

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Section: Reactive Lagrangian Scalar Tracking Algorithmmentioning

confidence: 99%