The Experts below are selected from a list of 21 Experts worldwide ranked by ideXlab platform

Andreas De La Martiniere Petroll - One of the best experts on this subject based on the ideXlab platform.

  • natural convection in a tank of oil experimental validation of a numerical code with Prescribed Boundary Condition
    Experimental Thermal and Fluid Science, 2005
    Co-Authors: Rejane De Cesaro Oliveski, Mario Henrique Macagnan, Jacqueline Biancon Copetti, Andreas De La Martiniere Petroll
    Abstract:

    Abstract This work presents a numerical and experimental analysis of the thermal stratification inside a tank containing thermal oil. Starting from an initial Condition of uniform temperature, the tank is submitted to a cooling regime in the natural convection provoked by the thermal losses to the environment. The numerical analysis is accomplished with a two-dimensional model in cylindrical coordinates with the Finite Volumes method. The program is fed with polynomials originated from experimental tests, in function of the tank height and time, prescribing the tank sidewall temperature. The bottom and the top of the tank were thermally insulated. The temperatures of the tank sidewall and centerline were measured with copper-constantan thermocouples. Results of the temperature variation at the centerline, along the time and for several tank heights, are presented. A dynamic analysis of the problem is presented through velocity fields. The numerical results show a good agreement with the experimental results.

Rejane De Cesaro Oliveski - One of the best experts on this subject based on the ideXlab platform.

  • natural convection in a tank of oil experimental validation of a numerical code with Prescribed Boundary Condition
    Experimental Thermal and Fluid Science, 2005
    Co-Authors: Rejane De Cesaro Oliveski, Mario Henrique Macagnan, Jacqueline Biancon Copetti, Andreas De La Martiniere Petroll
    Abstract:

    Abstract This work presents a numerical and experimental analysis of the thermal stratification inside a tank containing thermal oil. Starting from an initial Condition of uniform temperature, the tank is submitted to a cooling regime in the natural convection provoked by the thermal losses to the environment. The numerical analysis is accomplished with a two-dimensional model in cylindrical coordinates with the Finite Volumes method. The program is fed with polynomials originated from experimental tests, in function of the tank height and time, prescribing the tank sidewall temperature. The bottom and the top of the tank were thermally insulated. The temperatures of the tank sidewall and centerline were measured with copper-constantan thermocouples. Results of the temperature variation at the centerline, along the time and for several tank heights, are presented. A dynamic analysis of the problem is presented through velocity fields. The numerical results show a good agreement with the experimental results.

Jacqueline Biancon Copetti - One of the best experts on this subject based on the ideXlab platform.

  • natural convection in a tank of oil experimental validation of a numerical code with Prescribed Boundary Condition
    Experimental Thermal and Fluid Science, 2005
    Co-Authors: Rejane De Cesaro Oliveski, Mario Henrique Macagnan, Jacqueline Biancon Copetti, Andreas De La Martiniere Petroll
    Abstract:

    Abstract This work presents a numerical and experimental analysis of the thermal stratification inside a tank containing thermal oil. Starting from an initial Condition of uniform temperature, the tank is submitted to a cooling regime in the natural convection provoked by the thermal losses to the environment. The numerical analysis is accomplished with a two-dimensional model in cylindrical coordinates with the Finite Volumes method. The program is fed with polynomials originated from experimental tests, in function of the tank height and time, prescribing the tank sidewall temperature. The bottom and the top of the tank were thermally insulated. The temperatures of the tank sidewall and centerline were measured with copper-constantan thermocouples. Results of the temperature variation at the centerline, along the time and for several tank heights, are presented. A dynamic analysis of the problem is presented through velocity fields. The numerical results show a good agreement with the experimental results.

Mario Henrique Macagnan - One of the best experts on this subject based on the ideXlab platform.

  • natural convection in a tank of oil experimental validation of a numerical code with Prescribed Boundary Condition
    Experimental Thermal and Fluid Science, 2005
    Co-Authors: Rejane De Cesaro Oliveski, Mario Henrique Macagnan, Jacqueline Biancon Copetti, Andreas De La Martiniere Petroll
    Abstract:

    Abstract This work presents a numerical and experimental analysis of the thermal stratification inside a tank containing thermal oil. Starting from an initial Condition of uniform temperature, the tank is submitted to a cooling regime in the natural convection provoked by the thermal losses to the environment. The numerical analysis is accomplished with a two-dimensional model in cylindrical coordinates with the Finite Volumes method. The program is fed with polynomials originated from experimental tests, in function of the tank height and time, prescribing the tank sidewall temperature. The bottom and the top of the tank were thermally insulated. The temperatures of the tank sidewall and centerline were measured with copper-constantan thermocouples. Results of the temperature variation at the centerline, along the time and for several tank heights, are presented. A dynamic analysis of the problem is presented through velocity fields. The numerical results show a good agreement with the experimental results.

Bruce W Sellwood - One of the best experts on this subject based on the ideXlab platform.

  • an evaluation of two spatial interpolation techniques in global sea surface temperature reconstructions last glacial maximum and pliocene case studies
    Quaternary Science Reviews, 2004
    Co-Authors: Steve P Taylor, Alan M Haywood, Paul J Valdes, Bruce W Sellwood
    Abstract:

    Abstract Global estimates of sea-surface temperature (SST) distributions represent an important Prescribed Boundary Condition for atmosphere-only general circulation models (AGCMs) which aim to simulate the behaviour of the past climate system. We investigate the use of objective interpolation techniques, based on Delaunay triangulation and gridded-averaging, in translating point-based SST data into global maps. Existing global SST datasets generated by CLIMAP for the Last Glacial Maximum (LGM) and PRISM for the middle Pliocene are used as vehicles for evaluation. Results indicate that the sample quantity and array of the CLIMAP sites are sufficient to faithfully reconstruct major surface water patterns of the LGM. However, as problems with sample quantity and distribution become more acute in pre-Quaternary periods, interpolators are limited in their ability to produce reasonable estimates in data sparse regions. In such cases, potential biases associated with interpolation become significant enough to bring into doubt the overall validity of the global SST reconstruction. This limits the datasets use as a Prescribed Boundary Condition in AGCM simulations. On a regional scale, objective methods offer a valuable means of assessing data quality and constraining future subjective analysis. Primary rather than interpolated SST data remain extremely valuable as a tool to evaluate output from coupled ocean–atmosphere models rather than a Prescribed Boundary Condition in AGCM simulations.