Publications by Ivan Lunati | EPFL Graph Search

Related publications (13)

On the use of spatially discrete data to compute energy and mass balance

Marc Parlange, Ivan Lunati, Francesco Ciocca

In many practical applications the state of field soils is monitored by recording the evolution of temperature and soil moisture at discrete depths. We theoretically investigate the systematic errors that arise when mass and energy balances are computed di ...

American Geophysical Union2012

Gravity-driven slug motion in capillary tubes

Dani Or, Ivan Lunati

The velocity of a liquid slug falling in a capillary tube is lower than predicted for Poiseuille flow due to presence of menisci, whose shapes are determined by the complex interplay of capillary, viscous, and gravitational forces. Due to the presence of m ...

2009

Multiscale finite-volume method for density-driven flow in porous media

Ivan Lunati

The multiscale finite-volume (MSFV) method has been developed to solve multiphase flow problems on large and highly heterogeneous domains efficiently. It employs an auxiliary coarse grid, together with its dual, to define and solve a coarse-scale pressure ...

Springer Netherlands2008

Evaporation from a shallow water table: Diurnal dynamics of water and heat at the surface of drying sand

Marc Parlange, Ivan Lunati, Chad Higgins

Accurate estimates of water losses by evaporation from shallow water tables are important for hydrological, agricultural, and climatic purposes. An experiment was conducted in a weighing lysimeter to characterize the diurnal dynamics of evaporation under n ...

Amer Geophysical Union2013

On the Diurnal Soil Water Content Dynamics during Evaporation using Dielectric Methods

Marc Parlange, Ivan Lunati

The water content dynamics in the upper soil surface during evaporation is a key element in land–atmosphere exchanges. Previous experimental studies have suggested that the soil water content increases at the depth of 5 to 15 cm below the soil surface duri ...

2010

Evolution of superficial lake water temperature profile under diurnal radiative forcing

Marc Parlange, Ulrich Lemmin, Wolf Hendrik Huwald, Ivan Lunati, Nikki Vercauteren

In lentic water bodies, such as lakes, the water temperature near the surface typically increases during the day, and decreases during the night as a consequence of the diurnal radiative forcing (solar and infrared radiation). These temperature variations ...

American Geophysical Union2011

A Lagrangian, stochastic modeling framework for multi-phase flow in porous media

Ivan Lunati

Many of the complex physical processes relevant for compositional multi-phase flow in porous media are well understood at the pore-scale level. In order to study CO2 storage in sub-surface formations, however, it is not feasible to perform simulations at t ...

2008

Young's law and the effects of interfacial energy on the pressure at the solid-fluid interface

Ivan Lunati

In a recent paper [R. Finn, Phys. Fluids 18, 047102 (2006)] the attention has been drawn on the tension component perpendicular to the solid surface that results from Young's law. Considering the problem of a solid sphere floating in zero gravity, it has b ...

2007

Effects of the water retention curve on evaporation from arid soils

Marc Parlange, Ivan Lunati, Francesco Ciocca

Water retention curves approaching infinitely negative matric potentials at residual water content are widely employed to model soil moisture dynamics. When used in numerical simulations, these retention curves fail to satisfactorily describe evaporation f ...

Amer Geophysical Union2014

Modeling complex wells with the multi-scale finite-volume method

Ivan Lunati

In this paper, an extension of the multi-scale finite-volume (MSFV) method is devised, which allows to simulate flow and transport in reservoirs with complex well configurations. The new framework fits nicely into the data structure of the original MSFV me ...

2009

Issues in characterizing heterogeneity and connectivity in non-multiGaussian media

Ivan Lunati

The performances of kriging, stochastic simulations and sequential self-calibration inversion are assessed when characterizing a non-multiGaussian synthetic 2D braided channel aquifer. The comparison is based on a series of criteria such as the reproductio ...

2008

Interplay of gravity, capillary and viscous forces on fluid volumes moving through a fracture

Dani Or, Ivan Lunati

2007

AN OPERATOR FORMULATION OF THE MULTISCALE FINITE-VOLUME METHOD WITH CORRECTION FUNCTION

Ivan Lunati

The multiscale finite-volume (MSFV) method has been derived to efficiently solve large problems with spatially varying coefficients. The fine-scale problem is subdivided into local problems that can be solved separately and are coupled by a global problem. ...

2009