Grid independency Sample Clauses

Grid independency. (NCSRD/JRC)‌ The resolution of the computational mesh can affect the results. Therefore it is crucial that in the initial stages of any numerical investigation, including the validation, simulations with increasingly finer mesh resolution are performed until negligible differences in the target variables are reached (if computing power permits performing such simulations on a finer grid in a reasonable time). Usually at least three meshes (coarse, intermediate, and fine) are required in a mesh sensitivity analysis as this allows for the quantification of the numerical errors. The grid convergence index based on the Xxxxxxxxxx extrapolation (Xxxxxxxxxx 1911), (Xxxxxxxxxx and Xxxxx 1927) provides an estimate of the grid convergence error (Xxxxxx 1994). The relative error between results from different grids is a good indicator of grid independence (XXXXXX consortium, D3.2 2016). Ideally, the average length of the computational cells should be halved in each grid refinement. If this systematic refinement of the mesh is unfeasible because of the subsequent excessive simulation times, it is then recommended to refine the mesh according to the experience of the user, through an evaluation of the convergence of the simulations using the trends in the target variables (Andreani et al. 2008). The grid could be refined primarily in the regions where high gradients and complex phenomena are expected to appear. These regions are for example the area around the hydrogen source and around vents. When a full grid sensitivity study is not possible because of the large size of the mesh, an alternative partial indication of the quality of the grid can be estimated by using the same mesh with different order numerical schemes. If the results with the higher order schemes are similar to those with the first order scheme, the numerical diffusion due to the coarse grid can be said to be minimal (XXXXXX consortium, D3.2 2016). Grid sensitivity studies with Large Eddy Simulation models require a special treatment. As explained by (Gullbrand, 2002), when explicit filtering is used, the explicit filter width has to be kept constant while the computational grid is refined to obtain a grid-independent solution. With implicit filtering, since the filter is directly connected to the mesh resolution, the solution converges towards a direct numerical simulation (DNS) as the grid is refined, and not towards the filtered Navier-Xxxxxx equations (Gullbrand, 2002). It must also be emphasized...
Sample 1
AutoNDA by SimpleDocs

Related to Grid independency

  • Monitoring Activities The Cheyenne MPO shall have the right to monitor all activities related to this Agreement that are performed by the Consultant or its subconsultants. This shall include, but not be limited to, the right to make site inspections at any time and with reasonable notice; to bring experts and consultants on site to examine or evaluate completed work or work in progress; to examine the books, ledgers, documents, papers, and records pertinent to this Agreement; and to observe personnel in every phase of performance of the related work.

  • Independent Development Receiving Party may currently or in the future be developing information internally, or receiving information internally, or receiving information from other parties that may be similar to the Disclosing Party's Confidential Information. Accordingly, nothing in this Agreement will be construed as a representation or inference that Receiving Party will not develop or have developed products or services, that, without violation of this Agreement, might compete with the products or systems contemplated by the Disclosing Party's Confidential Information.

  • IRO Independence and Objectivity The IRO must perform the Claims Review in a professionally independent and objective fashion, as defined in the most recent Government Auditing Standards issued by the United States Government Accountability Office.

  • MANAGEMENT OF EVALUATION OUTCOMES 12.1 The evaluation of the Employee’s performance will form the basis for rewarding outstanding performance or correcting unacceptable performance.

  • Independent Evaluation Buyer is an experienced and knowledgeable investor in the oil and gas business. Buyer has been advised by and has relied solely on its own expertise and legal, tax, title, reservoir engineering, environmental and other professional counsel concerning this transaction, the Properties, the value thereof and title thereto.

  • Evaluation Cycle Goal Setting and Development of the Educator Plan

  • Parties Independent The parties are and will at all times remain independent of each other and are not and will not represent themselves to be the agent, joint venturer, partner or employee of the other. No representations will be made or acts taken by either party which could establish or imply any apparent relationship of agency, joint venture, partnership or employment and neither party will be bound in any manner whatsoever by any agreements, warranties or representations made by the other party to any other person or entity, nor with respect to any other action of the other party.

  • Engagement of Independent Review Organization Within 60 days after the Effective Date, Xx. Xxxxxx shall engage an individual or entity, such as an accounting, auditing, or consulting firm (hereinafter “Independent Review Organization” or “IRO”), to perform the reviews listed in this Section III.C. The applicable requirements relating to the IRO are outlined in Appendix A to this IA, which is incorporated by reference.‌

  • Technical and Organizational Measures The following sections define SAP’s current technical and organizational measures. SAP may change these at any time without notice so long as it maintains a comparable or better level of security. Individual measures may be replaced by new measures that serve the same purpose without diminishing the security level protecting Personal Data.

  • Evaluation Rating The final summative evaluation level that is assigned to a teacher based on the holistic review of all Evaluation Factors, observed during the Evaluation Cycle. The rating shall be “accomplished”, “skilled”, “developing”, or “ineffective”. The final rating shall not be weighted in such a way that one (1) domain or component of the evaluation system has a higher importance than another, except that any area marked N/A shall not negatively impact the evaluation rating.

Time is Money Join Law Insider Premium to draft better contracts faster.