Carlo Nonino, Stefano Savino and Stefano Del Giudice
The purpose of this paper is to develop a simplified but accurate finite element procedure for the analysis of the conjugate conduction-convection heat transfer in cross-flow…
Abstract
Purpose
The purpose of this paper is to develop a simplified but accurate finite element procedure for the analysis of the conjugate conduction-convection heat transfer in cross-flow micro heat exchangers.
Design/methodology/approach
The velocity fields in single microchannels are calculated by solving the parabolised form of the momentum equations and later mapped onto the three-dimensional grid, corresponding to an appropriate portion of the micro heat exchanger, which is used for the solution of the energy equation in its elliptic form. To allow the use of finite elements elongated in the flow direction, layers of perpendicular microchannels can be meshed independently with grids that do not match at the common interface (domain decomposition).
Findings
An original and easy-to-implement method has been developed to deal with non-matching grids. Computed results show that increasing the number of microchannels per layer yields relative pressure drop increments that are larger than those displayed by the relative heat flow rates.
Research limitations/implications
The simplified procedure requires the assumption of constant thermophysical properties. The adopted domain decomposition technique yields non-symmetric system matrices.
Practical implications
The procedure can be very useful in the design of cross-flow micro heat exchangers.
Originality/value
The finite element procedure described in the paper requires only limited computational resources for the analysis of the conjugate conduction-convection heat transfer in cross-flow micro heat exchangers with a large number of microchannels per layer.
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Carlo Nonino and Stefano Savino
The purpose of this paper is twofold: to describe a relevant improvement to an in-house FEM procedure for the heat transfer analysis of cross-flow micro heat exchangers and to…
Abstract
Purpose
The purpose of this paper is twofold: to describe a relevant improvement to an in-house FEM procedure for the heat transfer analysis of cross-flow micro heat exchangers and to study the influence of microchannel cross-sectional geometry and solid wall thermal conductivity on the thermal performance of these microdevices.
Design/methodology/approach
The velocity field in each microchannel is calculated separately. Then the energy equation is solved in the whole computational domain. Domain decomposition and grids that do not match at the common interface are employed to make meshing more effective. Some flow maldistribution effects are taken into account.
Findings
The results show that larger thermal conductivities of the solid walls and rectangular cross-sectional geometries with higher aspect ratios allow the maximization of the total heat flow rate in the device. However, on the basis of the heat transfer per unit pumping power, the square cross-section could be the best option.
Research limitations/implications
The value of the average viscosity is assumed to be different in different microchannels, but constant within each of the microchannels.
Practical implications
The procedure can represent a valuable tool for the design of cross-flow micro heat exchangers.
Originality/value
In spite of requiring limited computational resources, the improved procedure can take into account flow maldistribution effects stemming from non-uniform microchannel temperatures.
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Vera D’Oriano, Raffaele Savino and Michele Visone
This paper aims to present an aerothermodynamic analysis of a new concept of a small hypersonic airplane. Aerodynamics characteristics for different flow conditions encountered…
Abstract
Purpose
This paper aims to present an aerothermodynamic analysis of a new concept of a small hypersonic airplane. Aerodynamics characteristics for different flow conditions encountered during the missions are analyzed. The effects of elevons deflection for pitch control and of the presence of engines on aerodynamic performances are also investigated for different flight conditions. The effects of boundary layer laminar–turbulent transition on aerodynamic heating are studied to preliminarily identify proper materials that can sustain the hypersonic phase.
Design/methodology/approach
Aerodynamic characteristics are predicted by means of the semi-empirical aerodynamic prediction code Missile DATCOM and computational fluid dynamics simulations. Computational fluid dynamics analysis is also performed to investigate aerodynamic heating phenomenon.
Findings
Major discrepancies between the results offered by the two methods have been registered in transonic regime, whereas in subsonic and super-hypersonic conditions, Missile DATCOM confirms to be a suitable tool for preliminary design steps. The results of the analysis show that for the identification of the materials that can sustain the hypersonic phase, the turbulent solution must be taken into account. Carbon fiber reinforced ceramics composite materials seem particularly well suited for the nose, wing and vertical tail leasing edges and control surfaces, while titanium alloys could be used for the rest of the vehicle surface.
Originality/value
This new concept of vehicle is designed both for point-to-point medium range hypersonic transportation and long duration suborbital space tourism missions, by integrating available technologies developed for aeronautical and space systems.
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Yu Li, Naigang Cui and Siyuan Rong
The purpose of this paper is to optimize the downrange for hypersonic boost‐glide (HBG) missile under near‐real condition, and to validate the suitability of proposed wall cooling…
Abstract
Purpose
The purpose of this paper is to optimize the downrange for hypersonic boost‐glide (HBG) missile under near‐real condition, and to validate the suitability of proposed wall cooling materials.
Design/methodology/approach
The trajectory optimization problem is characterized by a boost phase followed by a glide phase. A multi‐phase trajectory optimization tool is adopted to optimize the downrange. The associated optimal control problem has been solved by selecting a direct shooting method. The dynamics has been transcribed to a set of nonlinear constraints and the arising nonlinear programming problem has been solved through a sequential quadratic programming solver. An aerothermodynamics analysis method is introduced to calculate the aerodynamic heating at nose, leading edge, and ventral centerline regions.
Findings
HBG missile is suitable for long‐range attack, and the optimal trajectory solved is a novel boost‐glide‐skip trajectory, i.e. boost firstly, glide secondly, and skip at last. The proposed wall materials are valid.
Originality/value
This paper provides further study on the methods of trajectory design and aerothermodynamics analysis for HBG missile.
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Stefano Franco, Angelo Presenza, Antonio Messeni Petruzzelli and Enzo Peruffo
The purpose of this study is to explore how luxury companies can use knowledge embedded in tradition to set up effective business models.
Abstract
Purpose
The purpose of this study is to explore how luxury companies can use knowledge embedded in tradition to set up effective business models.
Design/methodology/approach
Given the limited coverage in previous literature regarding the manner in which tradition can be leveraged by companies to create and capture value, this paper adopts a qualitative approach, i.e. the exploratory analysis of a single case study, namely, that of the high-end Italian hotel Borgo Egnazia.
Findings
Within a focus on luxury firms, this paper conceptualizes the tradition-driven business model highlighting activities aimed at creating and capturing value by using knowledge embedded in tradition. Combining value creation and value capture with tacit and codified knowledge, the authors are able to highlight the components of a business model that uses tradition as its main distinctive resource.
Originality/value
To the best of the authors’ knowledge, this is the first study to explore how companies use tradition to create and capture value.
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Daniel Trabucchi and Stefano Magistretti
Over the past years – because of the huge impact of companies such as Airbnb and Uber – the concept of the platform became extremely popular in the business world. Still, the…
Abstract
Purpose
Over the past years – because of the huge impact of companies such as Airbnb and Uber – the concept of the platform became extremely popular in the business world. Still, the concept of the platform has been evolving for a long time in the management field, from internal platforms (like the famous case of Sony Walkman) to industry-wide platforms (like the case of computers with external software developers), up to transaction and two or multi-sided platforms (such as Airbnb and all the companies with a similar business model). Platforms are often considered disruptors in several industries, from accommodations to mobility to entertainment. Still, the disruptors in the creative world usually deal with the way in which they distribute content (Netflix or Spotify), rather than with the content itself. The purpose of this paper is to understand if and how platforms trategies can also be used in the creative industries.
Design/methodology/approach
This paper digs into the movie industry, studying the three most successful Superheroes sagas of the past two decades as follows: the Marvel Cinematic Universe (MCU), DC Comics and X-Men using a narrative approach. The three sagas are studied through network analysis to understand their “platform approach”.
Findings
The results show how platform strategies are relevant also in creative industries – defining the concept of “knowledge platform strategy” – and how they have a significant impact in terms of market performance. The MCU builds on a common knowledge through the various movies that enable the chance to rely on many of the platforms’ characteristics emerging from the literature.
Research limitations/implications
This research extends the concept of “platforms,” relying on the three kinds of platform defined in the managerial literature and introducing the “knowledge platform strategy” for creative industries. The main contribution is related to the extension of platforms in research fields where it has not been exploited. This opens up avenues for research both from a knowledge platform and creative industries perspectives.
Practical implications
Managers, working not only in creative industries but also in industries where a common knowledge basis may be leveraged to develop new products over time, may use the concept of “knowledge platform strategy” to rethink the new development process or knowledge management from a customer perspective.
Originality/value
This study explores a mature and relevant concept – the platforms – in a new filed, the creative industries using the case of Superheroes sagas, proposing a new perspective to explain the success of MCU while proposing a new platform strategy.
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Stefano Magistretti, Claudio Dell’Era, Federico Frattini and Antonio Messeni Petruzzelli
Several studies show that identity is a critical success factor in design-intensive industries, leading managers and executives to identify solutions that enable firms to…
Abstract
Purpose
Several studies show that identity is a critical success factor in design-intensive industries, leading managers and executives to identify solutions that enable firms to simultaneously innovate while preserving their link with the past. Accordingly, scholars have recently revealed the role of the so-called innovation through tradition strategy. Thus, the purpose of this study/paper is to understand how design intensive firms may exploit knowledge pertaining to the past.
Design/methodology/approach
The research contributes to this line of inquiry by conducting a longitudinal analysis of two leading Italian design-intensive firms, B&B Italia and Cassina S.p.A. Specifically, through almost 30 h of interviews with 11 key informants and the analysis of various secondary sources, a unique database of over 900 products covering the period of 1960-2016 was developed.
Findings
The findings reveal that both firms leverage knowledge from the past mainly to preserve firm identity, as indicated by the two indicators used to capture the use of knowledge pertaining to the past (i.e., design tradition intensity and design tradition depth). In addition, the study shows that the values of these indicators significantly increase when ownership control shifts from family-based to fund-based.
Originality/value
The paper looks at design artifacts as a source of knowledge, exploring how they can support firms in reinforcing their identity. The original contribution to the design through traditional literature is in unveiling the product signs dimension of this particular innovation strategy.
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Stefano Magistretti, Luis Allo, Roberto Verganti, Claudio Dell’Era and Felix Reutter
Mastering innovation in highly regulated markets might require companies to overcome significant barriers. Rules, laws and limitations on social, economic and institutional…
Abstract
Purpose
Mastering innovation in highly regulated markets might require companies to overcome significant barriers. Rules, laws and limitations on social, economic and institutional dimensions can hinder the ability of a company to transfer knowledge within and across organizational boundaries. However, as recent research in innovation management increasingly advocates user involvement and early understanding of user needs as best practices, the inability to freely interact with customers due to highly regulated market restrictions can hinder the company’s capability to innovate. Hence, this paper aims to shed light on how an emerging managerial approach, such as Design Sprint, can support companies operating in highly regulated markets to overcome user involvement limitations and boost human-centered innovation.
Design/methodology/approach
This paper sheds light on how to boost innovation in a highly regulated market by leveraging an in-depth case study. The study investigates the use of the Design Sprint approach adopted by the pharmaceutical multinational Johnson & Johnson to revise the way its R&D department orchestrates the new product development process, overcoming the user involvement challenges of highly regulated markets.
Findings
In analyzing six different projects undertaken in the past two years, the findings illustrate three microfoundational dimensions of the Design Sprint approach in highly regulated markets, the so-called 3T model: team, time and tools. Indeed, deploying the Design Sprint in a highly regulated market has proven that being able to experiment in the early stages, building rough prototypes in real-time and openly collaborating with partners is crucial to boost innovation and anticipate constraints.
Originality/value
The paper sheds light on the Design Sprint approach by initially grounding an emerging managerial approach on organizational and management theory, leveraging the lens of microfoundations. In doing so, this study suggests how Design Sprint is based on the pillars of experimentation, knowledge transfer and co-creation usually neglected in highly regulated markets where user involvement is challenging. Finally, this study discloses the importance of using a design-based methodology in fostering innovation in highly regulated markets.
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Stefano Magistretti, Claudio Dell'Era and Nicola Doppio
Design approaches to innovation are booming in both the academic and practitioner worlds. Tech giants are proposing different methodologies to develop technological innovation…
Abstract
Purpose
Design approaches to innovation are booming in both the academic and practitioner worlds. Tech giants are proposing different methodologies to develop technological innovation leveraging design principles, for example, Amazon with working backward and Google with Design Sprint. However, little is known on the role of these methodologies in managing the knowledge translation among different stakeholders. This paper aims to investigate how Design Sprint approaches can face digital challenges and foster collaborations.
Design/methodology/approach
Through interviews and participatory observations of ten exploratory cases of SME adoption of the Design Sprint methodology, data were collected, organized, clustered and then validated. Furthermore, by adopting a configuration theory perspective, the data have been processed to contribute to the emergence of two Design Sprint organizational taxonomy.
Findings
Competences, type of design challenge and the process followed emerge from the cases as key drivers of different Design Sprint configurations. Moreover, the configuration theory helped in identifying two Design Sprint taxonomies named Willing and Wondering configurations. Finally, the paper provides managers with practical guidelines on how to leverage these configurations to make this approach more effective for SMEs and how this method helps the knowledge translation.
Originality/value
The value and originality of the paper are in defining Design Sprint from a theoretical point of view and offering practical guidelines on how to adapt it to the particular context of collaborative digital environments of SMEs. Moreover, it contributes to enlarging the relevance of configurational theory in the creative industries.
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Valentina Della Corte, Giovanna Del Gaudio and Fabiana Sepe
Over the past few years, several scholars have focused on innovation strategies with specific regard to family food firms. In line with this research stream, the purpose of this…
Abstract
Purpose
Over the past few years, several scholars have focused on innovation strategies with specific regard to family food firms. In line with this research stream, the purpose of this paper is to understand how family food firms with long-standing traditions can implement innovative productions while remaining anchored to the past.
Design/methodology/approach
By adopting a qualitative research methodology, mainly based on a multiple case study, this paper seeks to cover some unexplored areas regarding the opportunity of combining tradition and innovation to achieve success in the highly competitive international arena in which family food firms operate. The authors analyze the cases of “La Torrente,” “Cioccolatitaliani” and “La Fabbrica della Pasta di Gragnano.”
Findings
Successful family food firms leverage their deep-rooted knowledge of both family and local traditions to innovate. At same time, they establish continuous info exchange flows with all of the firm’s stakeholders by adopting an open innovation approach.
Research limitations/implications
From a theoretical perspective, there is a need for an in-depth study of how an effective blend of tradition and innovation is formalized, above all, in family firms. As for the practical implications, all the three case studies represent a best practice, especially for family firms with a long-standing history and strong local connections.
Practical implications
The paper shows how important it is to keep traditional factors in food industry and offers hints and suggestions to decision makers of family firms on how to valorize, in terms of competitiveness, their traditional resources – almost bound to their territory with innovation tools and processes.
Social implications
The paper is interesting because it offers an analysis of a specific group of firms – family firms – that characterize many industries in Italy and in Europe. Although often small, these firms can show dynamism and creativity. The paper offers hints on how to approach innovation in the sector while keeping the value of tradition.
Originality/value
The originality of the proposed conceptual model stems from the need to overcome the previous theoretical models, which deal separately with sources of past knowledge and sources of new and/or external knowledge.