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The purpose of this paper is to present a numerical analysis of the flow and heat transfer in a tube with a wire coil insert. A second law analysis of the results is accounted for, in order to assess the local and overall entropy generation in relation with the increased pressure drop and convective heat transfer. A wire coil with p/D=1.25 and e/D=0.076 is selected as insert device. A Reynolds number range between 100 and 1,000 is investigated, which corresponds to the typical operating regimes in the risers of liquid solar collectors. Different wall heat fluxes and inclination angles allow to analyze the potential impact of mixed convection in the presence of tube inserts.

Three-dimensional numerical simulations are performed using a finite-volume solver, assuming laminar flow conditions. Pure water and a mixture of water and propylene-glycol (20 percent) are used as working fluids, with temperature-dependent properties. Fanning friction factor, Nusselt number and local entropy generation results are obtained in the fully developed region.

The friction factor results are successfully compared with a well-known experimental correlation for wire coil inserts. The earlier onset of transition is devised at Re > 300. Nusselt number augmentations between 2.5- and 6-fold are reported with respect to the smooth tube. The mixed convection regime encountered in the smooth tube for the operating conditions investigated is canceled in the wire coiled tube, owing to the opposed effect of the swirl flow induced and the bouyancy forces. Frictional, heat transfer and overall entropy generation rates are computed locally in the fully developed region, allowing to relate these results with the flow structures in the mixed convection smooth tube and in the wire coiled tube. A threefold decrease in the entropy generation rate is reported for tubes with wire coil inserts.

An holistic understanding of the heat transfer enhancement in tubes with wire coil inserts is provided through the analysis of the flow pattern, Fanning friction factor, Nusselt number and local entropy generation rates. The reduced entropy generation in the enhanced tube serves as a performance criteria to confirm the positive effect of wire coil inserts in heat transfer for the operating regime under investigation, in spite of the increased pressure drop.

The purpose of this paper is to describe the flow structure and the time-resolved and time-mean heat transfer characteristics in the interaction between a synthetic jet and a cross flow, when an obstruction reduces the cross-section of the orifice where the jet is formed.

The microchannel flow interacted by the pulsed jet is modeled using a two-dimensional finite volume simulation with unsteady Reynolds-averaged Navier-Stokes equations while using the Shear-Stress-Transport (SST) k-ω turbulence model to account for fluid turbulence.

The computational results show a good and rapid increase of the synthetic jet influence on heat transfer enhancement when the obstruction of the orifice is superior to 30 per cent and the synthetic jet oscillating amplitudes are below 50 µm. It is found that when the obstruction is close to the exit orifice, the heat transfer enhancement is significant. The obstruction has proved to accelerate the jet and change the formation of large vortical structures. Additional windward vortices appear, which influence the flow field and enhance the heat transfer.

The work proposes the use of a compound enhancement technique for electronics cooling. A limited range of operating conditions and geometrical configurations is presented. A further analysis of the performance evaluation, based on the increased energy consumption of the device, would complement the study.

The authors provide a compound technique to enhance heat transfer in synthetic-jet electronic cooling devices.

The purpose of this paper is to examine the relationship between working capital management (WCM) and firm profitability for a sample of 437 non-financial Indian companies.

The study is based on secondary financial data obtained from Capitaline database, pertaining to a period of ten years. This study employs two-step generalized method of moments (GMM) techniques to arrive at results.

The results of the study confirm the inverted U-shape relationship between WCM and firm profitability. In addition, the authors also found that the firms should complete its CCC on an average by 63 days.

Unlike prior studies that found a linear relationship between WCM and firm profitability. This study provides newer evidence for an inverted U-shaped relation between investment in working capital and firm profitability in India. In addition, this study uses GMM to control the potential problems of endogeneity.

This study analyzes how the notion of the people emerged in two (neo)liberal societies during the crisis in 2019: Hong Kong and Chile.

From a qualitative and comparative perspective, 131 middle-class individuals were interviewed during heightened contentious activity in Hong Kong and Chile. The interviews were analyzed based on Ruiz's model for sociological discourse analysis.

The study shows that in contexts strongly influenced by liberalism, the notion of “people” is not advertised antagonistically against the individual but as complementary, and to this end, it emphasizes the heterogeneity of repertoires or demands. The comparison of these two movements highlighted the importance of democratic institutions in shaping the outcomes and effectiveness of protests.

Enacting the National Security Law in Hong Kong and the mandatory blockade imposed by both governments in response to the COVID-19 pandemic required an adaptation in the design and execution of the interviews, adopting a hybrid format. The volatility that characterizes periods of political crisis requires longitudinal follow-up. This article does not capture but can be explored in associated research publications.

The research offers two significant contributions: it addresses the immediate context by conducting on-site research during the most significant contemporary crises in Hong Kong and Chile. Secondly, it problematizes the understanding of the people in liberal societies and proposes it as a complementary (and not antagonistic) concept to that of the individual.

The purpose of this study is to quantitatively aggregate the findings of prior literature on the effect of working capital management (WCM) on corporate profitability using the meta-analysis technique developed by Hunter et al. (1982).

A set of 46 research articles that directly studied the relationship between WCM, and profitability was analyzed for the purpose. In addition to overall meta-analysis, a detailed subgroup study was also conducted to test whether the differences in results are due to moderating effects related to different profitability proxies, economic development of a specific country and size of the firms under study.

The findings of this meta-analysis confirm that WCM is negatively associated with profitability, which means an aggressive WCM policy leads to higher profitability. Overall, and in all the subgroup studies, the cash conversion cycle was found to be negatively associated with profitability.

Unlike narrative literature review papers, this meta-analysis provides quantitatively aggregate evidence on the relationship of WCM and firms’ profitability. To the best of authors’ knowledge, no previous meta-analysis paper is published on the topic.

The intangible nature of tourism means that variables such as destination image (DIM) or intention to recommend (IR) are crucial for tourists, as they are reliable sources of information. However, since these are dynamic variables, they have been affected by Covid-19 and need to be updated. Based on the above, the purpose of this study is to examine how the unlearning (UL) process helps tourists to become aware of the new situation, relinquish old habits and relearn, thus, influencing DIM and the IR destinations. Furthermore, the relationship between DIM and IR is analysed.

To analyse the proposed model, an empirical analysis was carried out through an online survey obtaining a valid sample of 457 Spanish domestic travellers. The data were analysed using partial least square structural equation modelling (PLS-SEM).

Results show a positive effect between the UL outcomes and IR a destination, as well as a mediator effect of DIM on this relationship.

To the best of the authors’ knowledge, this study analyses for the first time UL in the tourism sector as an individual process carried out by tourists and shows how it influences their decision-making process.

La naturaleza intangible del turismo hace que variables como la imagen del destino o la intención de recomendarlo sean decisivas para los turistas, al considerarlas fuentes de información fiables. Dado su carácter dinámico, estas variables se han visto afectadas por la pandemia del Covid-19 y necesitan ser actualizadas. En base a lo anterior, el objetivo de este estudio es analizar cómo el proceso de desaprendizaje ayuda a los turistas a ser conscientes de la nueva situación, a abandonar los viejos hábitos y a reaprender, influyendo así en la imagen del destino y en la intención de recomendarlos. Asimismo, se analiza la relación entre la imagen del destino y la intención de recomendarlo.

Para analizar el modelo propuesto se llevó a cabo un estudio empírico basado en una encuesta online, obteniendo una muestra válida de 457 viajeros nacionales españoles. Los datos se han analizado mediante PLS-SEM.

Los resultados del estudio muestran un efecto positivo entre los resultados del desaprendizaje y la intención de recomendar destinos, así como un efecto mediador de la imagen de destino en esta relación.

Este estudio analiza por primera vez el desaprendizaje en el sector turístico como un proceso individual llevado a cabo por turistas y muestra cómo influye en el proceso de toma de decisiones de estos.

This study aims to explore the moderating effects of strategy on the relationship between working capital management (WCM) and profitability.

A data sample of 72,444 firm-year observations of US-listed firms during 2000–2020 was used. The research hypotheses were tested using a panel regression analysis and an appropriate research instrument that signifies a firm’s strategic positioning.

The prospecting (defending) strategy has a decreasing (increasing) moderating effect on the relationship between WCM and profitability. The empirical findings are not affected by the level of earnings management, the presence of motives to meet earnings targets or the intensity of unreported intangible assets. Additionally, the reported empirical results remain robust within the context of propensity score matching regression analysis, in the presence of nonlinear effects of WCM on profitability, when alternative measures of WCM are used, and between firms with an increase or decrease in future profitability or different levels of efficiency on net WCM investments.

This study may stimulate future research exploring the moderating effects of various variables on the relationship between WCM and operating performance.

The findings highlight the importance of strategy for improving the performance evaluation of WCM policies and the prediction accuracy of the consequences of a strategy on short-term operating performance.

Prior empirical research has documented either a negative or positive relationship between WCM and profitability, which implies the presence of moderating effects of various factors. This study provides empirical evidence of the moderating effects of strategy on the relationship between WCM and profitability.

The purpose of this paper is to analyse the relationship between organisational learning capabilities (OLCs) and innovation performance (IP) in organisational contexts where knowledge creation and exploitation are the business’ main source of competitive advantage.

The study hypotheses are tested on a unique sample of 74 high-performance businesses operating in knowledge-intensive business services (KIBS) industries and non-knowledge intensive sectors in 2016. The study employs a sequential deductive triangulation analysis (QUAN → qual) based on linear regression models and qualitative interviews.

The results indicate that OLCs positively impact IP. Additionally, the findings reveal that this relationship is stronger in organisations where knowledge creation and exploitation constitute the main source of competitive advantage, namely, KIBS firms.

This paper offers insights into how the innovation outcomes of OLCs are heterogeneous across industries. This study contributes to a better understanding of the conditions under which the effects of developing learning-enhancing strategies occur in businesses operating in different industries.

Both knowledge generation and exploitation processes are critical for business success, and OLCs play a decisive role in this process. In this sense, the results suggest that managers need to turn their attention to the characteristics of business operations when considering the development of strategies aimed at enhancing OLCs.

The paper further explores the influence of OLCs on IP by analysing how organisational learning strategies interact with relevant organisational characteristics – that are linked here to the exploitation of knowledge-based resources – to yield superior IP.

Este trabajo analiza la relación entre capacidades de aprendizaje organizativo y desempeño innovador en contextos organizacionales donde tanto la creación como la explotación de conocimiento constituyen la principal fuente de ventaja competitiva de las empresas.

Para la verificación empírica de las hipótesis planteadas en este trabajo se emplea una base de datos del 2016 que incluye información de 74 empresas ‘gacela’ que operan en sectores de servicios intensivos en conocimiento (KIBS) y en industrias no intensivas en conocimiento. El estudio utiliza un análisis de triangulación secuencial deductiva (QUAN → qual) basado en modelos de regresión lineal y entrevistas en profundidad de corte cualitativo.

Los resultados indican que las capacidades de aprendizaje organizativo impactan positivamente el desempeño innovador. Además, los resultados revelan que esta relación es más pronunciada en empresas – empresas KIBS – donde la creación y la explotación de conocimiento son la principal fuente de ventaja competitiva.

Este trabajo ofrece resultados sobre la heterogeneidad de los rendimientos de las capacidades de aprendizaje organizativo, en términos de innovación. Además, este estudio contribuye a un mejor entendimiento de las condiciones bajo las cuales la implantación de estrategias orientadas a mejorar el aprendizaje organizacional se materializa en un mayor desempeño innovador en empresas que operan en distintos sectores económicos.

Tanto la creación como la explotación de conocimiento son procesos clave para el éxito empresarial, y las capacidades de aprendizaje organizativo juegan un papel fundamental en este proceso. En este sentido, los resultados del estudio sugieren que los directores y gestores de empresas deben tener en consideración las características de los procesos operativos de sus empresas a la hora de diseñar e implementar estrategias que buscan mejorar las capacidades de aprendizaje organizativo al interior de la empresa.

Este trabajo investiga en profundidad el efecto de las capacidades de aprendizaje organizativo sobre el desempeño innovador mediante un análisis que busca explicar cómo las estrategias de aprendizaje organizativo interactúan con importantes características de la empresa – las cuales asociamos a la explotación de recursos basados en conocimiento – para generar mayores niveles de desempeño innovador dentro de la empresa.

Although marketing is essential for a firm’s survival and growth, a set of entrepreneurial strategic orientations may help it gain a competitive advantage. Entrepreneurial marketing (EM) is critical for growing businesses to succeed in today's fast-paced industry. The present study aims to measure the role of EM on the business performance (BP) of Indian startups.

For this purpose, a thorough literature review was conducted to develop a scale from the proposed conceptual framework – EMICO by Jones and Rowley (2009b). To assess the reliability and validity of the scale (62 items), the data are analyzed by employing partial least square-structural equation modeling (PLS-SEM).

The scale is empirically tested, and the results lead to discussions. The results show the positive impact of entrepreneurial orientation (EO), marketing orientation (MO), innovation orientation (IO) and customer orientation (CO) on the BP of the startups. The paper concludes by suggesting managerial and practical implications, also providing future research agenda.

Our objective is to address the existing dearth of comprehensive scales for evaluating EM by undertaking a rigorous statistical approach. Notably, our research represents the pioneering effort in adopting the EMICO framework and subsequently formulating and empirically validating a robust scale specifically tailored for nascent or small-scale startups within the Indian context.

The present study aims to investigate the impact of working capital management (WCM) practices on the investment and financing patterns of listed nonfinancial companies in Pakistan for a span of 10 years.

The study is based on secondary financial data of 354 listed nonfinancial Pakistani firms during the period of 2005–2014. The two-step generalized method of moment (GMM) regression estimation technique is employed to ensure the robustness of results.

Empirical testing reveals that: excessive funds tied up in working capital have a negative impact on the investment portfolio of sample firms. Besides, a negative relationship between change in fixed assets and excess net working capital posits that, eventually, firms use idle resources tied up in short-lived assets to boost their investment activities. Furthermore, larger working capital levels were associated with higher leverage ratio which indicates that firms with inefficient WCM policies have to rely heavily on long-term debt to meet their short-term financing requirements. Additional results indicate that firms that take more time to sell inventory and convert receivables to cash, make more use of debt. Results of cash management models illustrate that cash-rich firms have lower leverage levels which signal the strong financial health and internal revenue generation capability of such firms.

There is a dearth of empirical studies that examine the implications of WCM decisions on a firm's capital structure. Besides, these studies are only confined to how a WCM policy influences the long-term investment activities of a firm. The research contributes to the extant literature by empirically revealing a link between the WCM practices and the firm's long-range investment and financing patterns. Hence, financial managers shall account for the impact of their short-term financial management decisions on the capital structure of the firm.