Question
Asked 3rd Feb, 2020

How do you import flow data into an Ansys Fluent flow simulation?

Hi all,
I have had to partition my flow model into segments due to element limitations and I am testing whether I can conduct my analysis by partitioning my model into smaller models and preforming the same analysis by carrying the solution data of one part into the inlet of the succeeding part.
I have attempted to export and import the data in a .dat file format but Fluent could not carry the information forward into a succeeding simulation.
It could read the data but said the "data size does not match current grid".
Warning: read-data: data size does not match current grid.
Warning: case and data files are inconsistent; zone 2, case [1,343], data [1,1029]
Warning: case and data files are inconsistent; zone 1, case [1,882], data [1,2744]
Warning: case and data files are inconsistent; zone 5, case [883,931], data [2745,2842]
Warning: case and data files are inconsistent; zone 6, case [932,980], data [2843,2891]
Warning: case and data files are inconsistent; zone 7, case [981,1176], data [2892,3430]
............. etc.
The topology of the outlet of the first segmented model and the inlet of the second model are simple 10 cm squares with the same number of elements.
Does anyone have insight into how to overcome this issue?
Please see attached JPEGs of my simplified test analysis.
Best Regards and Many Thanks.

All Answers (2)

Abdul Mohizin
KIST Europe Forschungsgesellschaft mbH
Hello Mr. Ryan. The '.dat' file is used to write the data value for the present mesh conditions. If you run a case and saved the data value as '.dat', it will store the data value of each every mesh element in the case. If you import a different mesh and try to read the data value from '.dat', it will show error as the mesh are different. From my understanding what you need is the data values from 'outlet' of the first mesh and need to give it as the 'inlet' of the second mesh. For that I recommend to use the 'file>>write>> profile' of the outlet in first case and 'file>>read>>profile' in the second case and give the inlet parameter as the read profile for the second case. Can look into https://www.afs.enea.it/project/neptunius/docs/fluent/html/ug/node266.htm , for some insight.
Dmitriy Karnaushenko
Technical University Chemnitz - MAIN research center
Something similar to your multi domain was discussed here:
And possible answer from Gert-Jan was:
" What you can try is: 1) setup your first case. In OutputControl>Export define a CFX CSV export file with particle information on the outlet. 2) run the simulation to generate the csv-file. 3) setup the second case. 4) import the csv-file as profile data (Under Tools) 5) Look for "Injection region" in the top ribbon. This menu allows injection positions from a Profile. "
I think would be similar for dat files or ports.
Ether manually rename mesh on the port side to match it to data from dat file
Or Generate profile flow on outlet and re import it for the second domain as inlet.

Similar questions and discussions

Recommendations

Poster
Full-text available
Partitioning a large-scale urban road network into several subnetworks enables a congestion characterization on a mesoscopic scale and serves as a prior procedure for many regional traffic control policies. While existing network partitioning algorithms are rigorous and pragmatic, they request accurate and integrated link density data that is not i...
Patent
Full-text available
A DS processing unit includes a grid module and a DSN interface. The grid module is operable to encrypt a data segment and to decrypt an encrypted data segment. To encrypt the data segment, the grid module partitions the data segment into portions and encrypts the portions using encryption keys generated from other portions to produce encrypted por...
Article
As one of the important part in aviation industry, nozzles are widely applied on the icing environment experiment. In this paper, we design and validate a novel internal-mixing nozzle for the icing experiment. To begin with, based on the requirements of experiment, the main structure sizes of nozzle are designed and the nozzle is processed for meas...
The Impact of The Centre for Secure Information Technologies (CSIT)
Sponsored Content
The Centre for Secure Information Technologies (CSIT) is a national cybersecurity research institute based at Queen’s emphasising research excellence combined with a unique model for, and focus on, commercialisation and innovation.
CSIT plays a key role in Northern Ireland’s cybersecurity ecosystem through the development of incubator programmes, start-ups and attracting foreign direct investment which had led to the creation of approximately 1600 jobs in this sector.
CSIT's mission is to produce significant high-quality impactful research in four key research areas:
- Secure connected services
- Networked security systems
- Industrial control systems
- Security intelligence
CSIT couples major research breakthroughs in the field of secure information technologies with a unique model of innovation and commercialisation to drive economic and societal impact. Cyber security challenges have grown exponentially in the last decade. A safe and secure cyberspace is fundamental to making the UK the safest place in the world to live and work online.
Industry engagement is at the heart of CSIT. Its unique membership model has seen the development of longstanding advisory and industrial collaborations with global partners including Altera, Allstate, BAE Systems, Cisco, Citi, Direct Line Group, First Derivatives, IBM, Infosys, Intel, McAfee, Roke, Seagate and Thales. This unique Open Innovation model allows research to translate to industry in an agile way, ensuring demonstrable technology is in the hands of end users quickly.
Transforming the Lives of People with Cystic Fibrosis
Sponsored Content
Researchers from Queen’s have transformed the lives of people with Cystic Fibrosis by leading on the clinical development of treatments that address the underlying genetic disorder.
Cystic Fibrosis is a progressive, life-limiting genetic disease that causes severe respiratory and digestive problems as well as other complications such as infections and diabetes.
There are over 80,000 people living with Cystic Fibrosis globally, including 10,500 in the UK accounting for 9,500 hospital admissions and over 100,000 bed days per year.
The condition is caused by a mutation in the cystic fibrosis transmembrane conductance regulator (CFTR) gene which is responsible for the regulation of salt and water levels in the body. The mutations can lead to the build-up of thick mucus in the lungs, digestive tract and other parts of the body causing persistent chest infections, resulting in lung damage and an early death.
Queen’s University’s Cystic Fibrosis research team is recognised as world leading, having worked for over 12 years supporting the development of drugs that improve the function of CTFR. during the last decade, Queen’s University Belfast has been at the forefront of major advancements in drugs targeting the underlying genetic deficit.
This work included the development of clinical trial protocols, and inclusion of key outcome measures such as; lung function (FEV1), pulmonary exacerbation rate, and Quality of Life (QoL) tools for use in clinical trials of new therapeutics.
Extensive clinical trial experience coupled with a Clinical Trial Network infrastructure established by Queen’s and the Belfast Health and Social Care Trust, resulted in Queen’s playing a pivotal role in a drug development programme working alongside Vertex Pharmaceuticals to deliver trials for single, double and triple therapies in Cystic Fibrosis.
1. There are over 80,000 people living with Cystic Fibrosis globally, including 10,500 in the UK - accounting for 9,500 hospital admissions and over 100,000 bed days per year.
2 The most recent trials successfully demonstrated that a combination of drugs can treat up to 90% of people with Cystic Fibrosis by addressing the underlying cause of their disease.
Got a technical question?
Get high-quality answers from experts.