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The purpose of this paper is to introduce the solution to two-phase flow in CO₂/brine system with salt precipitation by applying mixed hybrid finite element (MHFE) method to pressure equation and finite volume (FV) method to saturation equation. Mixed finite element method solves pressure and velocity in two subspaces while hybrid method is an extension of mixed method, where the Lagrange multiplier is added to the former in order to ensure the continuity from one element to the adjacent elements. The authors propose the modeling of salt precipitation using core flood experimental result and adapt to be applicable for numerical modeling.

The governing equations are discretized using Mixed Hybrid Finite Element-Finite Volume (MHFE-FV) method. This method has the feature of localized conservation which is attractive for application on heterogeneous porous media. In addition to this, the salt precipitation effect is modeled using the data from core flood experiment (Ott et al., 2011). The random data are linearized to obtain the relationship between salt precipitate and CO₂ saturation and implemented to the algorithm for two-phase flow in CO₂ and brine system.

The solution of MHFE-FV scheme has good agreement with the solution using implicit pressure and explicit saturation (IMPES) reported by Negara et al. (2011), with average error of 4.20 percent. Localized conservation is demonstrated in the case of randomized heterogeneous porous media where fingering effects are explicitly observed. Salt precipitation prediction using the proposed method is able to predict the decrement of porosity by 16.71 percent and permeability by 22.19 percent. This results in the decreased amount of CO₂ injected by 64.70 percent.

This paper presents the solution of two-phase flow in CO₂ brine system during CO₂ injection in saline aquifer using MHFE-FV method with the additional salt precipitation model obtained based on core flood experiment result.

A methodology to predict the salt precipitation based on CO₂ saturation.

Contribution to green house gas reduction.

The authors use MHFE-FV to solve hyperbolic PDE to obtain accurate results of CO₂ saturation, and subsequently use this to compute the salt precipitation.

This article is an editorial to JCHMSD's Volume 3, Issue 1 and aims to provide an overview to its selection of papers.

The article builds upon a previous editorial on the implementation of the new UNESCO Recommendation on the Historic Urban Landscape (HUL). It discusses a research and training programme under development by the World Heritage Institute of Training and Research in Asia and the Pacific (WHITRAP) and Tongji University's Advanced Research Institute for Architecture and Urban Planning, in Shanghai, China, to help determining a strategy for the application of the HUL approach in China.

The HUL approach facilitates a structuring and priority setting of competing needs and demands for the integration of urban development and heritage management processes, which is perhaps most pressing in the current Chinese context of rapid and large‐scale urbanization. However, its precise meaning, and therefore its merit, is still poorly understood in China due to confusing conceptual foundations and interpretations, primarily related to the terminology of “cultural landscape”.

This research paper outlines a series of pertinent issues and questions as part of a critical path –a “road map”– for the application of the HUL approach, as promoted by UNESCO, in China and it outlines key areas for further research, in particular as concerns the development of a toolkit.