scholarly journals Evaluating Precipitation Features and Rainfall Characteristics in a Multi‐Scale Modeling Framework

2020 ◽  
Vol 12 (8) ◽  
Author(s):  
Jiun‐Dar Chern ◽  
Wei‐Kuo Tao ◽  
Stephen E. Lang ◽  
Xiaowen Li ◽  
Toshihisa Matsui
Keyword(s):  
Modeling Framework ◽  
Rainfall Characteristics ◽  
Multi Scale ◽  
Scale Modeling ◽  
Multi Scale Modeling

A novel synergistic multi-scale modeling framework to predict micro- and meso-scale damage behaviors of 2D triaxially braided composite

2021 ◽  
pp. 105678952110339
Author(s):  
Hongyong Jiang ◽  
Yiru Ren ◽  
Qiduo Jin
Keyword(s):  
Compressive Load ◽  
Scale Model ◽  
Modeling Framework ◽  
Braided Composite ◽  
Multi Scale ◽  
Scale Modeling ◽  
Bridge Model ◽  
Multi Scale Modeling ◽  
Transverse Damage ◽  
Meso Scale

A novel synergistic multi-scale modeling framework with a coupling of micro- and meso-scale is proposed to predict damage behaviors of 2D-triaxially braided composite (2DTBC). Based on the Bridge model, the internal stress and micro damage of constituent materials are respectively coupled with the stress and damage of tow. The initial effective elastic properties of tow (IEEP) used as the predefined data are estimated by micro-mechanics models. Due to in-situ effects, stress concentration factor (SCF) is considered in the micro matrix, exhibiting progressive damage accumulation. Comparisons of IEEP and strengths between the Bridge and Chamis’ theory are conducted to validate the values of IEEP and SCF. Based on the representative volume element (RVE), the macro properties and damage modes of 2DTBC are predicted to be consistent with available experiments and meso-scale simulation. Both axial and transverse damage mechanisms of 2DTBC under tensile or compressive load are revealed. Micro fiber and matrix damage accumulations have significant effects on the meso-scale axial and transverse damage of tows due to multi-scale coupling effects. Different from existing meso-/multi-scale models, the proposed multi-scale model can capture a crucial phenomenon that the transverse damage of tow is vulnerable to micro fiber fracture. The proposed multi-scale framework provides a robust tool for future systematic studies on constituent materials level to larger-scale aeronautical materials.

scholarly journals A Generic Multi-scale Modeling Framework for Reactive Observing Systems: An Overview

2006 ◽  
pp. 514-521 ◽  
Author(s):  
Leana Golubchik ◽  
David Caron ◽  
Abhimanyu Das ◽  
Amit Dhariwal ◽  
Ramesh Govindan ◽  
...  
Keyword(s):  
Modeling Framework ◽  
Multi Scale ◽  
Scale Modeling ◽  
Multi Scale Modeling ◽  
Observing Systems

SAM++: Porting the E3SM-MMF cloud resolving model using a C++ portability library

2021 ◽  
pp. 109434202110444
Author(s):  
Isaac Lyngaas ◽  
Matt Norman ◽  
Youngsung Kim
Keyword(s):  
Atmospheric Modeling ◽  
System Model ◽  
Earth System ◽  
Modeling Framework ◽  
Multi Scale ◽  
Scale Modeling ◽  
Fortran Code ◽  
Code Base ◽  
Cloud Resolving Model ◽  
Multi Scale Modeling

In this work, we demonstrate the process for porting the cloud resolving model (CRM) used in the Energy Exascale Earth System Model Multi-Scale Modeling Framework (E3SM-MMF) from its original Fortran code base to C++ code using a portability library. This porting process is performed using the Yet Another Kernel Library (YAKL), a simplified C++ portability library that specializes in Fortran porting. In particular, we detail our step-by-step approach for porting the System for Atmospheric Modeling (SAM), the CRM used in E3SM-MMF, using a hybrid Fortran/C++ framework that allows for systematic reproduction and correctness testing of gradually ported YAKL C++ code. Additionally, analysis is done on the performance of the ported code using OLCF’s Summit supercomputer.

scholarly journals The Goddard multi-scale modeling system with unified physics

2009 ◽  
Vol 27 (8) ◽  
pp. 3055-3064 ◽  
Author(s):  
W.-K. Tao ◽  
D. Anderson ◽  
J. Chern ◽  
J. Entin ◽  
A. Hou ◽  
...  
Keyword(s):  
Land Surface ◽  
General Circulation ◽  
Regional Scale ◽  
Circulation Model ◽  
Scale Model ◽  
Modeling Framework ◽  
Multi Scale ◽  
Scale Modeling ◽  
Simulated Precipitation ◽  
Multi Scale Modeling

Abstract. Recently, a multi-scale modeling system with unified physics was developed at NASA Goddard. It consists of (1) a cloud-resolving model (CRM), (2) a regional-scale model, the NASA unified Weather Research and Forecasting Model (WRF), and (3) a coupled CRM-GCM (general circulation model, known as the Goddard Multi-scale Modeling Framework or MMF). The same cloud-microphysical processes, long- and short-wave radiative transfer and land-surface processes are applied in all of the models to study explicit cloud-radiation and cloud-surface interactive processes in this multi-scale modeling system. This modeling system has been coupled with a multi-satellite simulator for comparison and validation with NASA high-resolution satellite data. This paper reviews the development and presents some applications of the multi-scale modeling system, including results from using the multi-scale modeling system to study the interactions between clouds, precipitation, and aerosols. In addition, use of the multi-satellite simulator to identify the strengths and weaknesses of the model-simulated precipitation processes will be discussed as well as future model developments and applications.

Sign in / Sign up

Export Citation Format

Share Document