Mohan Damle, Rashmin
Total activity: 10
Research group
Heat and Mass Transfer Technological Center (CTTC)
E-mail
rashmin.mohan.damleestudiant.upc.edu
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Scientific and technological production
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1 to 10 of 10 results
  • Object-oriented simulation of reciprocating compressors: numerical verification and experimental comparison

     Mohan Damle, Rashmin; Rigola Serrano, Joaquim; Perez Segarra, Carlos David; Castro Gonzalez, Jesus; Oliva Llena, Asensio
    International journal of refrigeration / Revue internationale du froid
    Date of publication: 2011-12-01
    Journal article

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    Numerical simulation of reciprocating compressors is important for the design, development, improvement and optimization of the elements constituting the compressor circuit. In this work, an object-oriented unstructured modular numerical simulation of reciprocating compressors is presented. Pressure correction approach is applied for the resolution of tubes, chambers and compression chambers, while valve dynamics are modelled assuming a spring-mass system having single degree of freedom. The modular approach offers advantages of handling complex circuitry (e.g. parallel paths, multiple compressor chambers, etc.), coupling different simulation models for each element and adaptability to different configurations without changing the program. The code has been verified with some basic tests for assuring asymptotic behaviour to guarantee error free code and physically realistic results. Cases with different compressor configurations and working fluids (R134a, R600a and R744) have also been worked out. Numerical results are compared with experimental data and illustrative cases of multi-stage compression are also presented.

  • Modular simulation of buildings with an object-oriented tool

     Mohan Damle, Rashmin; Lehmkuhl Barba, Oriol; Colomer Rey, Guillem
    IIR International Congress of Refrigeration
    Presentation's date: 2011-08-23
    Presentation of work at congresses

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    The objective of this work is to develop a modular object-oriented building simulation tool “NEST” (Numerical Edifice Simulation Tool) which can be coupled with a parallel CFD software. To do so, a building is modelled as a collection of basic elements (walls, rooms, outdoor, openings, etc.). These elements are capable of solving themselves for given boundary conditions and can be linked to each other to form a specific building configuration. A modular approach gives flexibility of choosing a model for each element and to have different levels of modelling for different elements in the system. Also, new configurations can be made by adding or removing the required elements. Moreover, elements developed can be used for applications not restricted to buildings only. The object-oriented methodology, element descriptions, code validation with BESTEST cases, and transient thermal simulations of two different cases are presented in this paper.

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    Energy simulation of buildings with a modular object-oriented tool  Open access

     Mohan Damle, Rashmin; Colomer Rey, Guillem; Lehmkuhl Barba, Oriol; Rodriguez Pérez, Ivette Maria
    ISES Solar World Congress
    Presentation's date: 2011-08-29
    Presentation of work at congresses

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    The aim of this work is to develop a modular object-oriented tool “NEST” (Numerical Edifice Simulation Tool) for the energy simulation of buildings, which can be coupled with a parallel CFD software. For this purpose, a building is modelled as a collection of basic elements (walls, rooms, outdoor, openings, etc.). Different models (1D, 2D, simplified energy balances, CFD & HT, etc) are implemented for different elements which are capable of solving themselves for given boundary conditions. The elements can be linked to each other to form a specific building configuration. Thus new configurations can be quickly formed by adding or removing the required elements. Such an approach gives flexibility of choosing a model for each element and to have different levels of modelling for different elements in the system. Moreover, elements developed can be used for applications not restricted to buildings only. The object-oriented methodology, element descriptions, BESTEST cases for code validation, and transient thermal simulations of two different cases are presented in this paper.

    Postprint (author’s final draft)

  • Mixed convection in a ventilated 3D cavity : comparison of different LES models with experimental data

     Mohan Damle, Rashmin; Lehmkuhl Barba, Oriol; Colomer Rey, Guillem
    International Conference on Computational Heat and Mass Transfer
    Presentation's date: 2011-08-23
    Presentation of work at congresses

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    The aim of this work is to contribute to the progress in the determination of indoor airflow in buildings and to explore the possibility of coarse grid CFDsimulations for room airflow in building energy programs. To do so, a three dimensional ventilated cavity with mixed convection is simulated with different LES models and different meshes to see their influence on the numerical results. The Rayleigh number for this case is 2.23 x 109 and the Archimedes number is 0.036. This case is, to a certain extent, a representative of the flow that exists in real building rooms and is sufficiently complex for modelling. Also, the numerical results are compared with experimental data.

  • Full numerical simulation of an object oriented program for hermetic reciprocating compressors: numerical verification and experimental validation.

     Lehmkuhl Barba, Oriol; Mohan Damle, Rashmin; Rigola Serrano, Joaquim; Lopez Mas, Joan
    International Compressor Engineering Conference
    Presentation's date: 2010-07-12
    Presentation of work at congresses

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    An object oriented approach of the numerical simulation model for the thermal and fluid dynamic behavior of hermetic reciprocating compressors was previously presented (Damle, et al., 2008), describing the fluid flow resolution and its numerical verification, based on an updated version of the conservation equations resolution (continuity, momentum and energy) along the whole compressor domain in a sequential way (Pérez-Segarra, et al. 2003). In the present paper, not only a numerical verification is shown, but also an experimental validation is detailed, including to the object oriented code the heat transfer resolution between solid parts and its coupling with the fluid flow through compressor elements, in addition to kinematic and dynamic analysis of crankshaft vs. connecting rod mechanism. The present full object oriented numerical simulation program, together with a brief numerical verification is here presented, while a detailed experimental validation for different compressor capacities, fluid refrigerants and working fluids is also shown in order to assure the numerical results obtained and the possibilities offered by the new program.

  • Large Eddy Simulation of airflow in a single family house

     Mohan Damle, Rashmin; Colomer Rey, Guillem; Soria Guerrero, Manel; Lehmkuhl Barba, Oriol; Oliva Llena, Asensio
    International High Performance Buildings Conference
    Presentation's date: 2010-07-14
    Presentation of work at congresses

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    This work is addressed to contribute to the progress in the determination of indoor air flow in buildings. The air flow in such environments is caused by natural convection, stack and wind effects, infiltration of ambient air and mechanical ventilation. It is important to be able to predict the pressure, temperature and velocity distributions in order to maintain an adequate indoor environment and to minimize the energy demand at the same time. The problem is difficult due to the large and complex geometry involved, the changing boundary conditions, the mixture of free and forced convection and especially, because the flows are turbulent. The purpose of this work is to explore the feasibility of the use of Large Eddy Simulation (LES) models to carry out full scale simulations of airflow in buildings. A review of the previous works shows that the use of LES for this kind of problems has been restricted to idealized geometries and relatively low Re numbers. In this work, for code validation, a 3D cavity with mixed convection is simulated and the numerical results are compared with the experimental data of Blay, et al. (1992). Then, a single family house with a realistic geometry, Re number of 11834 and Rayleigh number of 2.4 x 1010 is solved using a Yoshizawa Smagorinsky LES model. The code TermoFluids has been used for the simulation and post-processing of the results.

  • Modular Simulation of Thermal Systems.

     Mohan Damle, Rashmin
    Defense's date: 2009-06-18
    Department of Heat Engines, Universitat Politècnica de Catalunya
    Theses

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  • CENTRE TECNOLOGIC TRANSFERENCIA CALOR

     Rigola Serrano, Joaquim; Capdevila Paramio, Roser; Jaramillo Ibarra, Julian Ernesto; Morales Ruiz, Sergio; Trias Miquel, Francesc Xavier; Castro Gonzalez, Jesus; Oliet Casasayas, Carles; Borrell Pol, Ricard; Rodriguez Pérez, Ivette Maria; Mohan Damle, Rashmin; Carmona Muñoz, Angel; Torras Ortiz, Santiago; Kizildag, Deniz; Ablanque Mejia, Nicolas; Lehmkuhl Barba, Oriol; Lopez Mas, Joan; Soria Guerrero, Manel; Gorobets, Andrey; Sadurni Caballol, Alexandre; Perez Segarra, Carlos David; Oliva Llena, Asensio
    Participation in a competitive project

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  • An Object Oriented program for the numerical simulation of hermetic reciprocating behaviour

     Mohan Damle, Rashmin; Rigola Serrano, Joaquim; Perez Segarra, Carlos David; Oliva Llena, Asensio
    International Compressor Engineering Conference
    Presentation of work at congresses

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  • Numerical simulations of differentially heated rectangular air cavities

     Mohan Damle, Rashmin; Cadafalch Rabasa, Jordi; Consul Serracanta, Ricard; Oliva Llena, Asensio
    International Conference on Solar Heating, Cooling and Buildings
    Presentation of work at congresses

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